Category: amides-buliding-blocks

Ren, Zhiqiang; Sun, Zhongliu; Li, Yifei; Fan, Xin; Dai, Mingda; Wang, Yunxia; Hu, Xiangdong published their research in Angewandte Chemie, International Edition in 2021. The article was titled 《Total Synthesis of (+)-3-Deoxyfortalpinoid F, (+)-Fortalpinoid A, and (+)-Cephinoid H》.Category: amides-buliding-blocks The article contains the following contents:

3-Deoxyfortalpinoid F, fortalpinoid A, and cephinoid H are members of the Cephalotaxus diterpenoids class of natural products, which feature diverse chem. structures and valuable biol. activities. We report herein the development of a diastereoselective Pauson-Khand reaction as an effective pathway to access the core tetracyclic skeleton, which is found widely in Cephalotaxus diterpenoids. Furthermore, we enabled the construction of the tropone moiety through a ring-closing metathesis/elimination protocol. Based on the developed strategy, asym. synthesis of the title compounds has been achieved for the first time. In the experiment, the researchers used N-Methoxy-N-methylacetamide(cas: 78191-00-1Category: amides-buliding-blocks)

N-Methoxy-N-methylacetamide(cas: 78191-00-1) belongs to anime. Large quantities of aliphatic amines are made synthetically. The most widely used industrial method is the reaction of alcohols with ammonia at a high temperature, catalyzed by metals or metal oxide catalysts (e.g., nickel or copper). Mixtures of primary, secondary, and tertiary amines are thereby produced.Category: amides-buliding-blocks

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

Siddiki, S. M. A. Hakim; Rashed, Nurnobi Md.; Touchy, Abeda Sultana; Jamil, A. R. Md.; Jing, Yuan; Toyao, Takashi; Maeno, Zen; Shimizu, Ken-ichi published their research in Catalysis Science & Technology in 2021. The article was titled 《Hydrolysis of amides to carboxylic acids catalyzed by Nb2O5》.Reference of N-Methoxy-N-methylacetamide The article contains the following contents:

Hydrolysis of amides RC(O)N(R1)R2 (R = Me, cyclohexyl, Ph, Bn, furan-2-yl, etc.; R1 = H, Me, Et, OMe; R2 = H, Me, Et, Ph, Bn) to carboxylic acids RC(O)OH is an industrially important reaction but is challenging due to the difficulty of cleaving the resonance stabilized amidic C-N bond. Twenty-three heterogeneous and homogenous catalysts were examined in the hydrolysis of acetamide. Results showed that Nb2O5 was the most effective heterogeneous catalyst with the greatest yield of acetic acid. A series of Nb2O5 catalysts calcined at various temperatures were characterized and tested in the hydrolysis of acetamide to determine the effects of crystal phase and surface properties of Nb2O5 on catalytic performance. The high catalytic performance observed was attributed mainly to the facile activation of the carbonyl bond by Lewis acid sites that function even in the presence of basic inhibitors (NH3 and H2O). The catalytic studies showed the synthetic advantages of the present method, such as simple operation, catalyst recyclability, additive free, solvent-free, and wide substrate scope (>40 examples; up to 95% isolated yield). In the experimental materials used by the author, we found N-Methoxy-N-methylacetamide(cas: 78191-00-1Reference of N-Methoxy-N-methylacetamide)

N-Methoxy-N-methylacetamide(cas: 78191-00-1) belongs to anime. Halogenation, in which one or more hydrogen atoms of an amine is replaced by a halogen atom, occurs with chlorine, bromine, and iodine, as well as with some other reagents, notably hypochlorous acid (HClO). With primary amines the reaction proceeds in two stages, producing N-chloro- and N,N-dichloro-amines, RNHCl and RNCl2, respectively. With tertiary amines, an alkyl group may be displaced by a halogen.Reference of N-Methoxy-N-methylacetamide

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

《Nickel-Catalyzed Cross-Coupling of Sulfonamides With (Hetero)aryl Chlorides》 was written by McGuire, Ryan T.; Simon, Connor M.; Yadav, Arun A.; Ferguson, Michael J.; Stradiotto, Mark. Product Details of 70-55-3 And the article was included in Angewandte Chemie, International Edition in 2020. The article conveys some information:

The development of Ni-catalyzed C-N cross-couplings of sulfonamides with (hetero)aryl chlorides is reported. These transformations, which were previously achievable only with Pd catalysis, are enabled using air-stable (L)NiCl(o-tol) pre-catalysts (L = PhPAd-DalPhos and PAd2-DalPhos), without photocatalysis. The collective scope of (pseudo)halide electrophiles (X = Cl, Br, I, OTs, and OC(O)NEt2) demonstrated herein is unprecedented for any reported catalyst system for sulfonamide C-N cross-coupling (Pd, Cu, Ni, or other). Preliminary competition experiments and relevant coordination chem. studies are also presented. In the experimental materials used by the author, we found 4-Methylbenzenesulfonamide(cas: 70-55-3Product Details of 70-55-3)

4-Methylbenzenesulfonamide(cas: 70-55-3) belongs to anime. Many important products require amines as part of their syntheses. Methylamine is utilized in the production of the analgesic meperidine (trade name Demerol) and the photographic developer Metol (trademark), and dimethylamine is used in the synthesis of the antihistamine diphenhydramine (trade name Benadryl), the solvent dimethylformamide (DMF), and the rocket propellant 1,1-dimethylhydrazine. The synthesis of the insect repellent N,N-diethyl-m-toluamide (DEET) incorporates diethylamine while that of the synthetic fibre Kevlar requires aromatic amines.Product Details of 70-55-3

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

《Synthesis of Sulfonyl Fluorides from Sulfonamides》 was published in European Journal of Organic Chemistry in 2020. These research results belong to Perez-Palau, Marina; Cornella, Josep. Synthetic Route of C7H9NO2S The article mentions the following:

Aryl sulfonyl fluorides and selected alkylsulfonyl fluorides were prepared chemoselectively from the corresponding sulfonamides by treatment with pyrylium tetrafluoroborate, MgCl2, and KF in MeCN followed by quenching with H2O. Functionalized sulfonamides and sulfonamides derived from pharmaceutical agents underwent deamination and fluorination to sulfonyl fluorides. In the part of experimental materials, we found many familiar compounds, such as 4-Methylbenzenesulfonamide(cas: 70-55-3Synthetic Route of C7H9NO2S)

4-Methylbenzenesulfonamide(cas: 70-55-3) belongs to anime. Left-handed and right-handed forms (mirror-image configurations, known as optical isomers or enantiomers) are possible when all the substituents on the central nitrogen atom are different (i.e., the nitrogen is chiral). With amines, there is extremely rapid inversion in which the two configurations are interconverted.Synthetic Route of C7H9NO2S

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

In 2018,Xiao, Peihong; Cao, Yanjun; Gui, Yingying; Gao, Lu; Song, Zhenlei published 《Me3Si-SiMe2[oCON(iPr)2-C6H4]: An Unsymmetrical Disilane Reagent for Regio- and Stereoselective Bis-Silylation of Alkynes》.Angewandte Chemie, International Edition published the findings.Application In Synthesis of N-Methoxy-N-methylacetamide The information in the text is summarized as follows:

The air-stable unsym. disilane Me3Si-SiMe2[o-CON(iPr)2C6H4] was developed for bis-silylation of alkynes. This reagent tolerates a range of functional groups, providing Z-vinyl disilanes in high yields. It is proposed that the phenyl-ring-tethered amide group directs oxidative addition of Pd0 into the Si-Si bond, which might facilitate formation of a six-membered Pd cycle, generating products with good to excellent regioselectivity. In the experimental materials used by the author, we found N-Methoxy-N-methylacetamide(cas: 78191-00-1Application In Synthesis of N-Methoxy-N-methylacetamide)

N-Methoxy-N-methylacetamide(cas: 78191-00-1) belongs to anime. Halogenation, in which one or more hydrogen atoms of an amine is replaced by a halogen atom, occurs with chlorine, bromine, and iodine, as well as with some other reagents, notably hypochlorous acid (HClO). With primary amines the reaction proceeds in two stages, producing N-chloro- and N,N-dichloro-amines, RNHCl and RNCl2, respectively. With tertiary amines, an alkyl group may be displaced by a halogen.Application In Synthesis of N-Methoxy-N-methylacetamide

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

In 2018,Nowak, Monika; Fornal, Emilia; Kontek, Renata; Sroczynski, Dariusz; Jozwiak, Andrzej; Augustowska, Ewelina; Warpas, Anna; Adamczyk, Marta; Malinowski, Zbigniew published 《Synthesis of acylnaphthylamines and their applications in the formation of benzoquinazolines》.ARKIVOC (Gainesville, FL, United States) published the findings.SDS of cas: 78191-00-1 The information in the text is summarized as follows:

The synthesis of acyl N-Boc-1-naphthylamines I (R1 = Me, t-Bu) and N-Boc-2-naphthylamines II (R2 = Me, i-Pr) and their transformation into alkyl substituted benzoquinazolines III (R3 = Me, t-Bu; X = H, Br) and alkyl substituted benzoquinazolinones IV (R4 = Me, i-Pr), V (R5 = Me, t-Bu) through the reaction with formamide or potassium cyanate in the presence of ammonium acetate is described. Presented acyl derivatives were obtained from the reactions of the corresponding lithiated N-Boc naphthylamines with various acetylating agents like AcCl, Ac2O, AcOEt, PivCl, i-PrCOCl and also Weinreb amides. Biol. screening of the potential cytotoxicity on the HT29 cell line and lymphocytes were demonstrated for some benzoquinazoline derivatives After reading the article, we found that the author used N-Methoxy-N-methylacetamide(cas: 78191-00-1SDS of cas: 78191-00-1)

N-Methoxy-N-methylacetamide(cas: 78191-00-1) belongs to anime. In organic chemistry, amines are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (NH3), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines).SDS of cas: 78191-00-1

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

In 2018,Yu, Jin-Sheng; Noda, Hidetoshi; Shibasaki, Masakatsu published 《Quaternary β2,2-amino acids: Catalytic asymmetric synthesis and incorporation into peptides by Fmoc-based solid-phase peptide synthesis》.Angewandte Chemie, International Edition published the findings.Recommanded Product: 71432-55-8 The information in the text is summarized as follows:

β-Amino acid incorporation has emerged as a promising approach to enhance the stability of parent peptides and to improve their biol. activity. Owing to the lack of reliable access to β2,2-amino acids in a setting suitable for peptide synthesis, most contemporary research efforts focus on the use of β3- and certain β2,3-amino acids. Herein, we report the catalytic asym. synthesis of β2,2-amino acids and their incorporation into peptides by Fmoc-based solid-phase peptide synthesis (Fmoc-SPPS). A quaternary carbon center was constructed by the palladium-catalyzed decarboxylative allylation of 4-substituted isoxazolidin-5-ones. The N-O bond in the products not only acts as a traceless protecting group for β-amino acids but also undergoes amide formation with α-ketoacids derived from Fmoc-protected α-amino acids, thus providing expeditious access to α-β2,2-dipeptides ready for Fmoc-SPPS. In addition to this study using tert-Butyl N,N’-diisopropylcarbamimidate, there are many other studies that have used tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8Recommanded Product: 71432-55-8) was used in this study.

tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8) belongs to anime. Amines characteristically form salts with acids; a hydrogen ion, H+, adds to the nitrogen. With the strong mineral acids (e.g., H2SO4, HNO3, and HCl), the reaction is vigorous. Salt formation is instantly reversed by strong bases such as NaOH. Neutral electrophiles (compounds attracted to regions of negative charge) also react with amines; alkyl halides (R′X) and analogous alkylating agents are important examples of electrophilic reagents.Recommanded Product: 71432-55-8

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

In 2018,Lopez-Tapia, Francisco; Brotherton-Pleiss, Christine; Yue, Peibin; Murakami, Heide; Costa Araujo, Ana Carolina; Reis dos Santos, Bruna; Ichinotsubo, Erin; Rabkin, Anna; Shah, Raj; Lantz, Megan; Chen, Suzie; Tius, Marcus A.; Turkson, James published 《Linker variation and structure-activity relationship analysis of carboxylic acid-based small molecule STAT3 inhibitors》.ACS Medicinal Chemistry Letters published the findings.Application In Synthesis of tert-Butyl N,N’-diisopropylcarbamimidate The information in the text is summarized as follows:

The mol. determinants for the activities of the reported benzoic acid (SH4-54), salicylic acid (BP-1-102), and benzohydroxamic acid (SH5-07)-based STAT3 inhibitors were investigated to design optimized analogs. All three leads are based on an N-methylglycinamide scaffold, with its two amine groups condensed with three different functionalities. The three functionalities and the CH2 group of the glycinamide scaffold were sep. modified. The replacement of the pentafluorobenzene or cyclohexylbenzene, or replacing the benzene ring of the aromatic carboxylic or hydroxamic acid motif with heterocyclic components (containing nitrogen and oxygen elements) all decreased potency. Notably, the Ala-linker analogs, (I) (R1 = H and OH), and the Pro-based derivative (II) (X = CH2), all with (R)-configuration at the chiral center, had improved inhibitory activity and selectivity against STAT3 DNA-binding activity in vitro, with IC50 of 3.0 ± 0.9, 1.80 ± 0.94, and 2.4 ± 0.2 μM, resp. Compounds I and II and other analogs inhibited constitutive STAT3 phosphorylation and activation in human breast cancer and melanoma lines, and blocked tumor cell viability, growth, colony formation, and migration in vitro. Pro-based analog, II (X = O)(sodium salt), with a relatively polar tetrahydropyranyl (THP) ring, instead of the cyclohexyl, showed improved permeability. In general, the (R)-configuration Pro-based analogs showed the overall best profile, including physicochem. properties (e.g., microsomal metabolic stability, Caco-2 permeability), and in particular, II (X = CH2) showed improved tumor-cell specificity. The results came from multiple reactions, including the reaction of tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8Application In Synthesis of tert-Butyl N,N’-diisopropylcarbamimidate)

tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8) belongs to anime. In organic chemistry, amines are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (NH3), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines).Application In Synthesis of tert-Butyl N,N’-diisopropylcarbamimidate

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

In 2013,Selivanova, Svetlana V.; Stellfeld, Timo; Heinrich, Tobias K.; Muller, Adrienne; Kramer, Stefanie D.; Schubiger, P. August; Schibli, Roger; Ametamey, Simon M.; Vos, Bernhard; Meding, Jorg; Bauser, Marcus; Hutter, Joachim; Dinkelborg, Ludger M. published 《Design, Synthesis, and Initial Evaluation of a High Affinity Positron Emission Tomography Probe for Imaging Matrix Metalloproteinases 2 and 9》.Journal of Medicinal Chemistry published the findings.Reference of tert-Butyl N,N’-diisopropylcarbamimidate The information in the text is summarized as follows:

The activity of matrix metalloproteinases (MMPs) is elevated locally under many pathol. conditions. Gelatinases MMP2 and MMP9 are of particular interest because of their implication in angiogenesis, cancer cell proliferation and metastasis, and atherosclerotic plaque rupture. The aim of this study was to identify and develop a selective gelatinase inhibitor for imaging active MMP2/MMP9 in vivo. We synthesized a series of N-sulfonylamino acid derivatives with low to high nanomolar inhibitory potencies. (R)-2-(4-(4-Fluorobenzamido)phenylsulfonamido)-3-(1H-indol-3-yl)propanoic acid (7) exhibited the best in vitro binding properties: MMP2 IC50 = 1.8 nM, MMP9 IC50 = 7.2 nM. Radiolabeling of 7 with no carrier added 18F-radioisotope was accomplished starting from iodonium salts as precursors. The radiochem. yield strongly depended on the iodonium counteranion (ClO4- > Br- > TFA- > tosylate). 18F-7 was obtained in up to 20% radiochem. yield (decay corrected), high radiochem. purity, and >90 GBq/μmol specific radioactivity. The radiolabeled compound showed excellent stability in vitro and in mice in vivo. In the experiment, the researchers used many compounds, for example, tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8Reference of tert-Butyl N,N’-diisopropylcarbamimidate)

tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8) belongs to anime. To avoid the problem of multiple alkylation, methods have been devised for “blocking” substitution so that only one alkyl group is introduced. The Gabriel synthesis is one such method; it utilizes phthalimide, C6H4(CO)2NH, whose one acidic hydrogen atom has been removed upon the addition of a base such as KOH to form a salt.Reference of tert-Butyl N,N’-diisopropylcarbamimidate

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

The author of 《Relative stabilities of glycolanilide and thioglycolanilide chelates》 were Apte, K. P.; Bhattacharya, A. K.. And the article was published in Journal of Inorganic and Nuclear Chemistry in 1973. Quality Control of 2-Hydroxy-N-phenylacetamide The author mentioned the following in the article:

Equilibrium constants were determined by pH titrations for complexation of H+ and M3+ (M = Al, Cr) with L (LH = glycolanilide, thioglycolanilide). In the part of experimental materials, we found many familiar compounds, such as 2-Hydroxy-N-phenylacetamide(cas: 4746-61-6Quality Control of 2-Hydroxy-N-phenylacetamide)

2-Hydroxy-N-phenylacetamide(cas: 4746-61-6) belongs to amides. Because of the greater electronegativity of oxygen, the carbonyl (C=O) is a stronger dipole than the N–C dipole. The presence of a C=O dipole and, to a lesser extent a N–C dipole, allows amides to act as H-bond acceptors.Quality Control of 2-Hydroxy-N-phenylacetamide In primary and secondary amides, the presence of N–H dipoles allows amides to function as H-bond donors as well.

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