Archives for Chemistry Experiments of C13H13N

Welcome to talk about 91-00-9, If you have any questions, you can contact Wang, L; Wang, XW; Hou, HB; Zhu, GQ; Han, ZY; Yang, WY; Chen, X; Wang, QG or send Email.. Category: amides-buliding-blocks

Category: amides-buliding-blocks. Wang, L; Wang, XW; Hou, HB; Zhu, GQ; Han, ZY; Yang, WY; Chen, X; Wang, QG in [Wang, Liang; Wang, Xiaowu; Hou, Hongbin; Zhu, Guangqian; Han, Zhenyu; Yang, Weiying; Chen, Xiao; Wang, Qinggang] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biobased Mat, Qingdao 266101, Peoples R China; [Zhu, Guangqian; Han, Zhenyu; Yang, Weiying] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China published An unsymmetrical binuclear iminopyridine-iron complex and its catalytic isoprene polymerization in 2020.0, Cited 51.0. The Name is Diphenylmethanamine. Through research, I have a further understanding and discovery of 91-00-9.

A series of chloride-bridged unsymmetrical mixed Fe(ii)-HS/Fe(ii)-LS binuclear structures has been prepared and characterized. Upon activation with MAO, highly efficient catalytic polymerization of isoprene was achieved, delivering an ultra-high molecular weight (catalyst loading = 2.5 ppm,M-n= 1.8 x 10(6)g mol(-1),M-w/M-n= 1.4).

Welcome to talk about 91-00-9, If you have any questions, you can contact Wang, L; Wang, XW; Hou, HB; Zhu, GQ; Han, ZY; Yang, WY; Chen, X; Wang, QG or send Email.. Category: amides-buliding-blocks

Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics

Discovery of Benzo[d][1,2,3]triazin-4(3H)-one

Welcome to talk about 90-16-4, If you have any questions, you can contact Zhang, ZG; Dai, SW; Li, L; Jia, CY; Zhang, Y; Li, H or send Email.. Formula: C7H5N3O

An article Scandium-catalyzed Michael addition of quinazolinones and vinylazaarenes WOS:000535721300001 published article about ALLYLIC SUBSTITUTION; FUNCTIONALIZATION; HYDROAMINATION; HETEROCYCLES; 2-PYRIDONES; ALKYLATION; DISCOVERY in [Zhang, Zhiguang; Dai, Siwei; Li, Ling; Jia, Chenyu; Zhang, Yong] Hebei Univ Sci & Technol, Coll Chem & Pharmaceut Engn, 26 Yuxiang Rd, Shijiazhuang 050018, Hebei, Peoples R China; [Li, Hao] East China Univ Sci & Technol, State Key Lab Bioengn Reactor, Shanghai Key Lab New Drug Design, 130 Meilong Rd, Shanghai 200237, Peoples R China; [Li, Hao] East China Univ Sci & Technol, Sch Pharm, 130 Meilong Rd, Shanghai 200237, Peoples R China in 2020, Cited 35. The Name is Benzo[d][1,2,3]triazin-4(3H)-one. Through research, I have a further understanding and discovery of 90-16-4. Formula: C7H5N3O

We described a novel scandium-catalyzed selective Michael addition of quinazolinones and vinylazaarenes. The protocol proceeds smoothly to give diverse quinazolinone derivatives in moderate to excellent yields. The high practicality of this protocol was proved by excellent chemo selectivity and broad substrate and functional group compatibility. (C) 2020 Elsevier Ltd. All rights reserved.

Welcome to talk about 90-16-4, If you have any questions, you can contact Zhang, ZG; Dai, SW; Li, L; Jia, CY; Zhang, Y; Li, H or send Email.. Formula: C7H5N3O

Reference:
Patent; Guizhou University; Xue Wei; Zhang Juping; Zhang Cheng; Chen Lijuan; Wang Yihui; Li Pu; Li Qin; Ruan Xianghui; Wang Xiaobin; Wu Xiaoqiong; Wang Jun; (24 pag.)CN107602493; (2019); B;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Brief introduction of 2-(4-Aminophenyl)ethanol

Recommanded Product: 2-(4-Aminophenyl)ethanol. Welcome to talk about 104-10-9, If you have any questions, you can contact Liu, B; Liu, CY; De Luca, HG; Pillai, SKR; Anthony, DB; Li, JH; Bismarck, A; Shaffer, MSP; Chan-Park, MB or send Email.

Recommanded Product: 2-(4-Aminophenyl)ethanol. Recently I am researching about POLYIMIDE; NANOCOMPOSITES; STRENGTH; EPOXY, Saw an article supported by the Singapore Ministry of Education Tier 3 grantMinistry of Education, Singapore [MOE2013-T3-1-002]; Singapore Ministry of Health Industry Alignment FundMinistry of Health-Singapore [NMRC/MOHIAFCAT2/003/2014]; A*Star Specialty Chemical grant [SERC A1786a0032]. Published in ROYAL SOC CHEMISTRY in CAMBRIDGE ,Authors: Liu, B; Liu, CY; De Luca, HG; Pillai, SKR; Anthony, DB; Li, JH; Bismarck, A; Shaffer, MSP; Chan-Park, MB. The CAS is 104-10-9. Through research, I have a further understanding and discovery of 2-(4-Aminophenyl)ethanol

Polyimides (PI) generally have a high affinity for single-walled carbon nanotubes (SWNTs), but they suffer from poor solubility in most low boiling point organic solvents and low compatibility with common resins (such as epoxy) used in composites, limiting their suitability as dispersants. PI block copolymer systems containing reactive poly(ester carbonate) s have not yet been reported and are expected to act as effective reactive dispersing agents of SWNTs. Herein, PI-derived block copolymers are synthesized via ring-opening copolymerization of lactide (LA) (a control monomer) and allyl-bearing 2-methyl-2-(allyloxycarbonyl)-propylene carbonate (MAC) from the OH-terminal ends of the PI block to produce PLA-PI-PLA (TB1, a control) and PMAC-PI-PMAC (TB2). The allyl pendant group of TB2 allows further facile functionalization to form a third series of epoxidized (EP) derivatives, i.e. PMACEP-block-PI-block-PMACEP (TB3). TB3 copolymer when mixed with a conventional structural epoxy resin forms blends that do not show inferior tensile properties compared with the epoxy, which is unusual. Furthermore, the mixing solvent tetrahydrofuran (THF) can be readily evaporated off after forming the blends. TB3-dispersed (2 wt%) SWNTs added to epoxy increased the tensile strength, modulus, and elongation at break of the resulting nanocomposite films by 40%, 34%, and 26% respectively, compared to the baseline epoxy resin. Furthermore, when TB3b triblock-dispersed SWNTs in epoxy were combined with fuzzy carbon fibers, i.e. carbon nanotube-grafted-carbon fibers (CNT-g-CF), a synergistic interfacial strength reinforcement was observed, together with shifting of the failure mode from the matrix interphase to the carbon fiber-grafted nanotube interface. The ultimate interfacial shear strength between the TB3-dispersed SWNT-epoxy matrix and the fuzzy carbon fibers (i.e., fibers having carbon nanotubes grown on them) measured via single fiber pull-out tests was 100 MPa, which was ca. 11% improvement over the baseline unsized carbon fiber in neat epoxy. To our knowledge, this is the first evidence of a synergistic enhancement in interfacial properties when fuzzy carbon fibers are combined with a SWNT-reinforced epoxy using the new epoxidized TB3 nanotube dispersing agent that forms a strong covalent TB3-epoxy interface. The new functionalizable TB3 synthesis route introduced here is generalizable to other PI-based copolymers with diverse functionalities and solvent compatibilities.

Recommanded Product: 2-(4-Aminophenyl)ethanol. Welcome to talk about 104-10-9, If you have any questions, you can contact Liu, B; Liu, CY; De Luca, HG; Pillai, SKR; Anthony, DB; Li, JH; Bismarck, A; Shaffer, MSP; Chan-Park, MB or send Email.

Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics

Get Up to Speed Quickly on Emerging Topics:Diphenylmethanamine

HPLC of Formula: C13H13N. About Diphenylmethanamine, If you have any questions, you can contact Wu, ZK; Zhai, YY; Zhao, WS; Wei, ZY; Yu, H; Han, S; Wei, YG or concate me.

Wu, ZK; Zhai, YY; Zhao, WS; Wei, ZY; Yu, H; Han, S; Wei, YG in [Wu, Zhikang; Zhai, Yongyan; Wei, Zheyu; Yu, Han; Han, Sheng] Shanghai Inst Technol, Sch Chem & Environm Engn, 100 Haiquan Rd, Shanghai 201418, Peoples R China; [Zhao, Wenshu] Shanghai Univ Tradit Chinese Med, Longhua Hosp, Shanghai, Peoples R China; [Yu, Han; Wei, Yongge] Tsinghua Univ, Dept Chem, Minist Educ, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China; [Wei, Yongge] Peking Univ, State Key Lab Nat & Biomimet Drugs, Beijing 100191, Peoples R China published An efficient way for the N-formylation of amines by inorganic-ligand supported iron catalysis in 2020, Cited 62. HPLC of Formula: C13H13N. The Name is Diphenylmethanamine. Through research, I have a further understanding and discovery of 91-00-9.

The first example of an inorganic-ligand supported iron(iii) catalysed coupling of formic acid and amines to form formamides is reported. The pure inorganic catalyst (NH4)(3)[FeMo6O18(OH)(6)] (1), which consists of a central Fe-III single-atomic core supported within a cycle-shaped inorganic ligand consisting of six (MoO6)-O-VI octahedra, shows excellent activity and selectivity, and avoids the use of complicated/commercially unavailable organic ligands. Various primary amines and secondary amines have been successfully transformed into the corresponding formamides under mild conditions, and the formylation of primary diamines has also been achieved for the first time. The Fe catalyst 1 can be reused several times without appreciable loss of activity.

HPLC of Formula: C13H13N. About Diphenylmethanamine, If you have any questions, you can contact Wu, ZK; Zhai, YY; Zhao, WS; Wei, ZY; Yu, H; Han, S; Wei, YG or concate me.

Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics

You Should Know Something about 91-00-9

Quality Control of Diphenylmethanamine. Bye, fridends, I hope you can learn more about C13H13N, If you have any questions, you can browse other blog as well. See you lster.

In 2020.0 ORG PROCESS RES DEV published article about HYDROGEN; BROMIDES; OLEFINS; ARYL in [Kallemeyn, Jeffrey M.; Engstrom, Kenneth M.; Pelc, Matthew J.; Lukin, Kirill A.; Morrill, Westin H.; Wei, Haojuan; Towne, Timothy B.; Henle, Jeremy; Nere, Nandkishor K.; Welch, Dennie S.; Shekhar, Shashank; Ravn, Matthew M.; Zhao, Gang; Fickes, Michael G.; Cink, Russell D.] AbbVie Inc, Proc Res & Dev, N Chicago, IL 60064 USA; [Ding, Chen; Vinci, John C.; Marren, James] AbbVie Inc, Analyt Res & Dev, N Chicago, IL 60064 USA in 2020.0, Cited 35.0. The Name is Diphenylmethanamine. Through research, I have a further understanding and discovery of 91-00-9. Quality Control of Diphenylmethanamine

Glecaprevir was identified as a potent hepatitis C virus (HCV) protease inhibitor, and a large-scale synthesis was required to support the late-stage clinical trials and subsequent commercial launch. The large-scale synthetic route to glecaprevir required the development of completely new synthetic approaches to the two key structural features: the 18-membered macrocycle 3 and the difluoromethyl-substituted cyclopropyl amino acid 4. In this first manuscript, we describe the route development for the macrocycle 3; the second manuscript will describe the development of a new synthetic route to the difluoromethyl-substituted cyclopropyl amino acid 4 and the final assembly of glecaprevir. The large-scale synthetic route to the macrocycle employed a unique intramolecular etherification reaction as the key step in the macrocycle synthesis, avoiding the scalability limitations of the ring-closing metathesis (RCM) reaction of the enabling route. The large-scale synthetic route to the macrocycle was successfully used to produce the amount of glecaprevir required to support the late-stage clinical development.

Quality Control of Diphenylmethanamine. Bye, fridends, I hope you can learn more about C13H13N, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics

Discover the magic of the Diphenylmethanamine

Quality Control of Diphenylmethanamine. Welcome to talk about 91-00-9, If you have any questions, you can contact Ingale, AP; Ukale, D; Garad, DN; Shinde, SV or send Email.

Quality Control of Diphenylmethanamine. Authors Ingale, AP; Ukale, D; Garad, DN; Shinde, SV in TAYLOR & FRANCIS INC published article about in [Ingale, Ajit P.] Savitribai Phule Pune Univ, Dada Patil Coll, Dept Chem, Ahmednagar, Maharashtra, India; [Ukale, Dattatraya] Univ Turku, Dept Chem, Turku, Finland; [Garad, Dnyaneshwar N.] Natl Univ Ireland Galway, Sch Chem, Galway, Ireland; [Shinde, Sandeep V.] Swami Ramanand Teerth Marathwada Univ, Pratibha Niketan Coll, Dept Chem, Nanded, India in 2021.0, Cited 17.0. The Name is Diphenylmethanamine. Through research, I have a further understanding and discovery of 91-00-9

Nanocerium oxide mediated an efficient and green protocol has been described for the chemoselective N-tert-butyloxycarbonylation of amines under the solvent-free conditions at ambient temperature. Various aliphatic, aromatic and heteroaromatic amines were protected using developed protocol and several functional groups such as alcohol, phenol and ester were well tolerated under these conditions. The rapid reaction rate, mild conditions, very good functional group tolerance, excellent yield, solvent-free, easy recovery products and excellent catalyst recyclability are the advantages of this protocol. This makes the protocol feasible, economical and environmentally benign.

Quality Control of Diphenylmethanamine. Welcome to talk about 91-00-9, If you have any questions, you can contact Ingale, AP; Ukale, D; Garad, DN; Shinde, SV or send Email.

Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics

How did you first get involved in researching 2-(4-Aminophenyl)ethanol

Welcome to talk about 104-10-9, If you have any questions, you can contact Bhupathiraju, NVSDK; Younes, A; Cao, MH; Ali, J; Cicek, HT; Tully, KM; Ponnala, S; Babich, JW; Deri, MA; Lewis, JS; Francesconi, LC; Drain, CM or send Email.. Recommanded Product: 104-10-9

Bhupathiraju, NVSDK; Younes, A; Cao, MH; Ali, J; Cicek, HT; Tully, KM; Ponnala, S; Babich, JW; Deri, MA; Lewis, JS; Francesconi, LC; Drain, CM in [Bhupathiraju, N. V. S. Dinesh K.; Younes, Ali; Cao, Minhua; Ali, Jafar; Cicek, Huseyin T.; Francesconi, Lynn C.; Drain, Charles Michael] CUNY Hunter Coll, Dept Chem, New York, NY 10065 USA; [Tully, Kathryn M.; Lewis, Jason S.] Weill Cornell Med, Dept Pharmacol, New York, NY 10065 USA; [Tully, Kathryn M.; Lewis, Jason S.] Mem Sloan Kettering Canc Ctr, Dept Radiol, Program Pharmacol, New York, NY 10065 USA; [Tully, Kathryn M.; Lewis, Jason S.] Mem Sloan Kettering Canc Ctr, Radiochem & Mol Imaging Probes Core, New York, NY 10065 USA; [Ponnala, Shashikanth; Babich, John W.] Weill Cornell Med, Radiophamaceut Sci, New York, NY USA; [Ponnala, Shashikanth; Babich, John W.] Weill Cornell Med, Dept Radiol, New York, NY USA; [Deri, Melissa A.] CUNY, Lehman Coll, Bronx, NY 10468 USA; [Deri, Melissa A.; Francesconi, Lynn C.; Drain, Charles Michael] CUNY, Grad Ctr, Chem Program, New York, NY 10016 USA published Improved synthesis of the bifunctional chelator p-SCN-Bn-HOPO in 2019.0, Cited 14.0. Recommanded Product: 104-10-9. The Name is 2-(4-Aminophenyl)ethanol. Through research, I have a further understanding and discovery of 104-10-9.

The bifunctional ligand p-SCN-Bn-HOPO, which has four 1,2-hydroxypyridinone groups on a spermine backbone with an isothiocyanate linker, has been shown to be an efficient and stable chelator for Zr(iv) and, more importantly, the radioisotope Zr-89 for use in radiolabeling antibodies for positron emission tomography (PET) imaging. Previous studies of Zr-89-HOPO-trastuzumab in mice showed low background, good tumor to organ contrast, and very low bone uptake which show p-SCN-Bn-HOPO to be an important next-generation bifunctional chelator for radioimmunoPET imaging with Zr-89. However, the reported synthesis of p-SCN-Bn-HOPO involves nine steps and multiple HPLC purifications with an overall yield of about 1.4%. Herein we report an improved and efficient synthesis of p-SCN-Bn-HOPO in four steps with 14.3% overall yield which will improve its availability for further biological studies and wider application in PET imaging. The new synthetic route also allows variation in linker length and chemistries which may be helpful in modifying in vivo clearance behaviors of future agents.

Welcome to talk about 104-10-9, If you have any questions, you can contact Bhupathiraju, NVSDK; Younes, A; Cao, MH; Ali, J; Cicek, HT; Tully, KM; Ponnala, S; Babich, JW; Deri, MA; Lewis, JS; Francesconi, LC; Drain, CM or send Email.. Recommanded Product: 104-10-9

Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics

Awesome Chemistry Experiments For Diphenylmethanamine

Product Details of 91-00-9. Welcome to talk about 91-00-9, If you have any questions, you can contact Lu, B; Cheng, Y; Chen, LY; Chen, JR; Xiao, WJ or send Email.

An article Photoinduced Copper-Catalyzed Radical Aminocarbonylation of Cycloketone Oxime Esters WOS:000485090400050 published article about C BOND-CLEAVAGE; METAL-FREE; CARBONYLATION REACTIONS; CARBON-MONOXIDE; ALKYL IODIDES; HALIDES; CHEMISTRY; COUPLINGS; ALKENES; SALTS in [Lu, Bin; Cheng, Ying; Chen, Li-Yan; Chen, Jia-Rong; Xiao, Wen-Jing] Cent China Normal Univ, Int Joint Res Ctr Intelligent Biosensing Technol, Key Lab Pesticides & Chem Biol, Minist Educ,Coll Chem, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China; [Xiao, Wen-Jing] Shanghai Inst Organ Chem, State Key Lab Organometall Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China in 2019.0, Cited 79.0. Product Details of 91-00-9. The Name is Diphenylmethanamine. Through research, I have a further understanding and discovery of 91-00-9

A visible light-induced and exogenous photo-sensitizer-free, copper-catalyzed radical aminocarbonylation of cycloketone oxime esters with CO gas and amines is developed. The mild catalytic system involving CuCl and N,N,N-tridentate ligand shows good reactivity and chemo-selectivity, and tolerates a wide range of cycloketone oxime esters and alkyl/aryl amines, giving the corresponding cyanoalkylated amides in moderate to good yields. Preliminary mechanistic studies suggest that the reaction involves a Cu-I/(CuCuIII)-Cu-II/-based catalytic cycle and radical intermediate.

Product Details of 91-00-9. Welcome to talk about 91-00-9, If you have any questions, you can contact Lu, B; Cheng, Y; Chen, LY; Chen, JR; Xiao, WJ or send Email.

Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics

How did you first get involved in researching 90-16-4

Application In Synthesis of Benzo[d][1,2,3]triazin-4(3H)-one. Welcome to talk about 90-16-4, If you have any questions, you can contact Zhang, ZG; Dai, SW; Li, L; Jia, CY; Zhang, Y; Li, H or send Email.

An article Scandium-catalyzed Michael addition of quinazolinones and vinylazaarenes WOS:000535721300001 published article about ALLYLIC SUBSTITUTION; FUNCTIONALIZATION; HYDROAMINATION; HETEROCYCLES; 2-PYRIDONES; ALKYLATION; DISCOVERY in [Zhang, Zhiguang; Dai, Siwei; Li, Ling; Jia, Chenyu; Zhang, Yong] Hebei Univ Sci & Technol, Coll Chem & Pharmaceut Engn, 26 Yuxiang Rd, Shijiazhuang 050018, Hebei, Peoples R China; [Li, Hao] East China Univ Sci & Technol, State Key Lab Bioengn Reactor, Shanghai Key Lab New Drug Design, 130 Meilong Rd, Shanghai 200237, Peoples R China; [Li, Hao] East China Univ Sci & Technol, Sch Pharm, 130 Meilong Rd, Shanghai 200237, Peoples R China in 2020, Cited 35. The Name is Benzo[d][1,2,3]triazin-4(3H)-one. Through research, I have a further understanding and discovery of 90-16-4. Application In Synthesis of Benzo[d][1,2,3]triazin-4(3H)-one

We described a novel scandium-catalyzed selective Michael addition of quinazolinones and vinylazaarenes. The protocol proceeds smoothly to give diverse quinazolinone derivatives in moderate to excellent yields. The high practicality of this protocol was proved by excellent chemo selectivity and broad substrate and functional group compatibility. (C) 2020 Elsevier Ltd. All rights reserved.

Application In Synthesis of Benzo[d][1,2,3]triazin-4(3H)-one. Welcome to talk about 90-16-4, If you have any questions, you can contact Zhang, ZG; Dai, SW; Li, L; Jia, CY; Zhang, Y; Li, H or send Email.

Reference:
Patent; Guizhou University; Xue Wei; Zhang Juping; Zhang Cheng; Chen Lijuan; Wang Yihui; Li Pu; Li Qin; Ruan Xianghui; Wang Xiaobin; Wu Xiaoqiong; Wang Jun; (24 pag.)CN107602493; (2019); B;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

What about chemistry interests you the most 91-00-9

Bye, fridends, I hope you can learn more about C13H13N, If you have any questions, you can browse other blog as well. See you lster.. Recommanded Product: Diphenylmethanamine

Authors Shelp, RA; Ciro, A; Pu, YG; Merchant, RR; Hughes, JME; Walsh, PJ in ROYAL SOC CHEMISTRY published article about in [Shelp, Russell A.; Ciro, Anthony; Pu, Youge; Walsh, Patrick J.] Univ Penn, Dept Chem, Roy & Diana Vagelos Labs, 231 South 34th St, Philadelphia, PA 19104 USA; [Merchant, Rohan R.] Merck & Co Inc, Dept Discovery Chem, San Francisco, CA 94080 USA; [Hughes, Jonathan M. E.] Merck & Co Inc, Dept Proc Res & Dev, Rahway, NJ 07065 USA in 2021, Cited 41. Recommanded Product: Diphenylmethanamine. The Name is Diphenylmethanamine. Through research, I have a further understanding and discovery of 91-00-9

We report a 3-component reaction between N-benzyl ketimines, [1.1.1]propellane, and pinacol boronates to generate benzylamine bicyclo[1.1.1]pentane (BCP) pinacol boronates. These structures are analogous to highly sought diarylmethanamine cores, which are common motifs in bioactive molecules. We demonstrate the versatility of the boronate ester handle via downstream functionalization through a variety of reactions, including a challenging Pd-catalyzed (hetero)arylation that exhibits a broad substrate scope. Together, these methods enable the synthesis of high-value BCP benzylamines which are inaccessible by existing methods. Furthermore, we demonstrate the successful application of these newly developed (hetero)arylation conditions to a variety of challenging tertiary pinacol boronates, including nitrogen-containing heterocycles, 1,1-disubstituted cyclopropanes, and other BCP cores.

Bye, fridends, I hope you can learn more about C13H13N, If you have any questions, you can browse other blog as well. See you lster.. Recommanded Product: Diphenylmethanamine

Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics