Category: amides-buliding-blocks

Peng, Tian-Yu; Xu, Zhe-Yuan; Zhang, Feng-Lian; Li, Bin; Xu, Wen-Ping; Fu, Yao; Wang, Yi-Feng published an article in Angewandte Chemie, International Edition. The title of the article was 《Dehydroxylative Alkylation of α-Hydroxy Carboxylic Acids Derivatives via a Spin-Center Shift》.Application In Synthesis of 2-Hydroxy-N-phenylacetamide The author mentioned the following in the article:

A strategically distinct dehydroxylative alkylation reaction of α-hydroxy carboxylic acid derivatives I (Ar1 = 4-NCC6H4, 4-EtO2CC6H4, 2-pyridyl, etc.) with alkenes is developed. The reaction starts with the attack of a 4-dimethylaminopyridine (DMAP)-boryl radical to the carbonyl oxygen atom, followed by a spin-center shift (SCS) to trigger the C-O bond scission. The resulting α-carbonyl radicals couple with a wide range of alkenes to furnish various alkylated products II (Ar1 = 4-NCC6H4, 4-EtO2CC6H4, 2-pyridyl, etc.; R = n-Bu, Ph, 3-MeC6H4, etc.) . This strategy allows for the efficient conversion of a wide array of α-hydroxy amides and esters derived from several biomass mols. and natural products to value-added compounds Exptl. and computational studies verified the reaction mechanism. In the experiment, the researchers used many compounds, for example, 2-Hydroxy-N-phenylacetamide(cas: 4746-61-6Application In Synthesis 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.Application In Synthesis 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

In 2014,European Journal of Organic Chemistry included an article by Barroso, Raquel; Escribano, Maria; Cabal, Maria-Paz; Valdes, Carlos. Reference of (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide. The article was titled 《Tosylhydrazide-Promoted Diastereoselective Intramolecular 1,3-Dipolar Cycloadditions: Synthesis of Tetrahydropyrrolo[3,4-c]pyrazoles》. The information in the text is summarized as follows:

A very straightforward diastereoselective synthesis of tetrahydropyrrolo[3,4-c]pyrazoles by intramol. 1,3-dipolar cycloaddition is described. The starting materials for the synthetic route are N-Boc-protected α-amino acids, which are first transformed into N-allyl-α-amino ketones through conventional methodologies. Then, a one-pot sequence that involves formation of a tosylhydrazone from the ketone, base-induced decomposition of the hydrazone, and intramol. 1,3-dipolar cycloaddition of the diazo compound generated, gives rise to the bicyclic systems with total diastereoselectivity and high preservation of the enantiomeric purity. However, the analogous process employing α-amino aldehydes lacks stereoselectivity. DFT computational modeling has been carried out to account for the different behavior of the two types of systems. In addition to this study using (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide, there are many other studies that have used (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide(cas: 87694-50-6Reference of (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide) was used in this study.

(S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide(cas: 87694-50-6) 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.“,” In primary and secondary amides, the presence of N–H dipoles allows amides to function as H-bond donors as well. Reference of (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide

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

Garcia-Urricelqui, Ane; de Cozar, Abel; Mielgo, Antonia; Palomo, Claudio published an article on February 4 ,2021. The article was titled 《Probing α-Amino Aldehydes as Weakly Acidic Pronucleophiles: Direct Access to Quaternary α-Amino Aldehydes by an Enantioselective Michael Addition Catalyzed by Bronsted Bases》, and you may find the article in Chemistry – A European Journal.Recommanded Product: 87694-50-6 The information in the text is summarized as follows:

The chem. of α-amino aldehydes was expanded beyond their limits by documenting the first direct α-alkylation of α-branched α-amino aldehydes with nitroolefins. The reaction produced densely functionalized products bearing up to two, quaternary and tertiary, vicinal stereocenters with high diastereo- and enantioselectivity. DFT modeling lead to the proposal that intramol. hydrogen bonding between the NH group and the carbonyl oxygen atom in the starting α-amino aldehyde was key for reaction stereocontrol. In the experiment, the researchers used many compounds, for example, (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide(cas: 87694-50-6Recommanded Product: 87694-50-6)

(S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide(cas: 87694-50-6) belongs to amides. Amides include many other important biological compounds, as well as many drugs like paracetamol, penicillin and LSD. Low-molecular-weight amides, such as dimethylformamide, are common solvents.Recommanded Product: 87694-50-6

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

Dong, Xiao-Wu; Zhang, Jian-Kang; Xu, Lei; Che, Jin-Xin; Cheng, Gang; Hu, Xiao-Bei; Sheng, Li; Gao, An-Hui; Li, Jia; Liu, Tao; Hu, Yong-Zhou; Zhou, Yu-Bo published an article on February 15 ,2019. The article was titled 《Covalent docking modelling-based discovery of tripeptidyl epoxyketone proteasome inhibitors composed of aliphatic-heterocycles》, and you may find the article in European Journal of Medicinal Chemistry.Safety of (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide The information in the text is summarized as follows:

The potential of specific proteasome inhibitors to act as anti-cancer agents has attracted intensive investigations. The proteasome can be covalently inhibited by epoxyketone derivatives via a two-step reaction. Several computational approaches have been developed to mimic the covalent binding event. Compound 1 (I) composed of a six-membered heterocyclic ring was designed by using covalent docking. With a possible different binding mode from the clin. compound Carfilzomib, it occupied the S5 pocket of 20S proteasome and showed favorable inhibitory activity. Subsequently optimization and evaluation were taken place. Among these compounds, 11h (II) demonstrated extraordinary in vitro inhibitory activity and selectivity, and good in vivo proteasome inhibitory activity, a favorable pharmacokinetic profile and xenograft tumor inhibition. The possible binding pattern of compound II against proteasome was further fully explored via calculations, providing a theor. basis for finding potent proteasome inhibitors. After reading the article, we found that the author used (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide(cas: 87694-50-6Safety of (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide)

(S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide(cas: 87694-50-6) belongs to amides. Because of the greater electronegativity of oxygen, the carbonyl (C=O) is a stronger dipole than the N–C dipole.Safety of (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide The presence of a C=O dipole and, to a lesser extent a N–C dipole, allows amides to act as H-bond acceptors. 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

《Synthesis of α, β-unsaturated γ-amino esters with unprecedented high (E)-stereoselectivity and their conformational analysis in peptides》 was published in Organic & Biomolecular Chemistry in 2011. These research results belong to Mali, Sachitanand M.; Bandyopadhyay, Anupam; Jadhav, Sandip V.; Kumar, Mothukuri Ganesh; Gopi, Hosahudya N.. Safety of (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide The article mentions the following:

Mild, efficient and racemization-free synthesis of N-protected α, β-unsaturated γ-amino esters with unprecedented high E- stereoselectivity is described. This method is found to be compatible with Boc- (Boc = tert-butoxycarbonyl), Fmoc- (Fmoc = 9-fluorenylmethoxycarbonyl) and other side chain protecting groups. The crystal conformations of the vinylogous γ-amino esters in monomers and in homo- and mixed dipeptides are studied. Further, the vinylogous homo-dipeptide showed a β-sheet conformation, while mixed α- and α,β-unsaturated γ-hybrid dipeptide adapted an irregular structure in single crystals. In the experiment, the researchers used (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide(cas: 87694-50-6Safety of (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide)

(S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide(cas: 87694-50-6) belongs to amides.Safety of (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide The solubilities of amides and esters are roughly comparable. Typically amides are less soluble than comparable amines and carboxylic acids since these compounds can both donate and accept hydrogen bonds.

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

《Synthesis and characterization of 1,2,4-triazolo[1,5-a]pyrimidine-2-carboxamide-based compounds targeting the PA-PB1 interface of influenza A virus polymerase》 was written by Massari, Serena; Bertagnin, Chiara; Pismataro, Maria Chiara; Donnadio, Anna; Nannetti, Giulio; Felicetti, Tommaso; Di Bona, Stefano; Nizi, Maria Giulia; Tensi, Leonardo; Manfroni, Giuseppe; Loza, Maria Isabel; Sabatini, Stefano; Cecchetti, Violetta; Brea, Jose; Goracci, Laura; Loregian, Arianna; Tabarrini, Oriana. Application of 683-57-8This research focused ontriazolopyrimidine carboxamide preparation antiviral SAR viral protein PB1; Influenza virus; PA-PB1 heterodimerization; Protein-protein interaction; RNA-Dependent RNA polymerase. The article conveys some information:

In search for new anti-Influenza viruses (Flu) drugs, authors have focused on viral RNA-dependent RNA polymerase (RdRP) developing disruptors of PA-PB1 subunits interface with the best compounds characterized by cycloheptathiophene-3-carboxamide and 1,2,4-triazolo[1,5-a]pyrimidine-2-carboxamide scaffolds. By merging these moieties, two very interesting hybrid compounds were recently identified, starting from which, in this paper, a series of analogs were designed and synthesized. In particular, a thorough exploration of the cycloheptathiophene-3-carboxamide moiety led to acquire important SAR insight and identify new active compounds showing both the ability to inhibit PA-PB1 interaction and viral replication in the micromolar range and at non-toxic concentrations For few compounds, the ability to efficiently inhibit PA-PB1 subunits interaction did not translate into anti-Flu activity. Chem./phys. properties were investigated for a couple of compounds suggesting that the low solubility of compound I, due to a strong crystal lattice, may have impaired its antiviral activity. Finally, computational studies performed on compound II, in which the Ph ring suitably replaced the cycloheptathiophene, suggested that, in addition to hydrophobic interactions, H-bonds enhanced its binding within the PAC cavity. In the part of experimental materials, we found many familiar compounds, such as 2-Bromoacetamide(cas: 683-57-8Application of 683-57-8)

2-Bromoacetamide(cas: 683-57-8) can be used in preparation of (2-carbamoylmethoxy-5-chloro-benzyl)-carbamic acid tert-butyl ester. It was aslo used as precursor to dehydropeptidase I inactivator.Application of 683-57-8

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

《L-Type amino acid transporter 1 activity of 1,2,3-triazolyl analogs of L-histidine and L-tryptophan》 was written by Hall, Colton; Wolfe, Hannah; Wells, Alyssa; Chien, Huan-Chieh; Colas, Claire; Schlessinger, Avner; Giacomini, Kathleen M.; Thomas, Allen A.. HPLC of Formula: 71432-55-8This research focused ontriazole preparation cell uptake LAT1 inhibitor antitumor agent; Click chem Huisgen cycloaddition brain disorder; membrane transporter triazole histidine tryptophan; Amino acid; Blood-brain barrier; Cancer; Click chemistry; Membrane transporter; Solute carrier family; Triazole. The article conveys some information:

A series of 1,2,3-triazole analogs of the amino acids L-histidine and L-tryptophan were modeled, synthesized and tested for L-type amino acid transporter 1 (LAT1; SLC7A5) activity to guide the design of amino acid-drug conjugates (prodrugs). These triazoles were conveniently prepared by the highly convergent Huisgen 1,3-dipolar cycloaddition (Click Chem.). Despite comparable predicted binding modes, triazoles generally demonstrated reduced cell uptake and LAT1 binding potency relative to their natural amino acid counterparts. The structure-activity relationship (SAR) data for these triazoles has important ramifications for treating cancer and brain disorders using amino acid prodrugs or LAT1 inhibitors. In the experiment, the researchers used tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8HPLC of Formula: 71432-55-8)

tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8) belongs to anime. Amines can be classified according to the nature and number of substituents on nitrogen. Aliphatic amines contain only H and alkyl substituents. Aromatic amines have the nitrogen atom connected to an aromatic ring.Important amines include amino acids, biogenic amines, trimethylamine, and aniline. Inorganic derivatives of ammonia are also called amines, such as monochloramine (NClH2).HPLC of Formula: 71432-55-8

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

SDS of cas: 70-55-3In 2020 ,《Highly Regio-, Diastereo- and Enantioselective Synthesis of Tetrahydroazepines and Benzo[b]oxepines through Palladium-Catalyzed [4+3] Cycloaddition Reactions》 was published in Angewandte Chemie, International Edition. The article was written by Trost, Barry M.; Zuo, Zhijun. The article contains the following contents:

A novel Pd0-catalyzed asym. [4+3] annulation reaction of two readily accessible starting materials was developed for building seven-membered heterocyclic architectures. The potential [3+2] side pathway could be suppressed though fine tuning of the conditions. A broad scope of cycloaddition donors and acceptors participated in the transformation with excellent chemo-, regio-, diastereo- and enantioselectivtities, leading to valuable tetrahydroazepines, e.g., I and benzo[b]oxepines, e.g., II. In addition to this study using 4-Methylbenzenesulfonamide, there are many other studies that have used 4-Methylbenzenesulfonamide(cas: 70-55-3SDS of cas: 70-55-3) was used in this study.

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.SDS of cas: 70-55-3

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

COA of Formula: C11H24N2OIn 2012 ,《A Direct Catalytic Asymmetric Aldol Reaction of α-Sulfanyl Lactones: Efficient Synthesis of SPT Inhibitors》 was published in Angewandte Chemie, International Edition. The article was written by Takechi, Sho; Yasuda, Shigeo; Kumagai, Naoya; Shibasaki, Masakatsu. The article contains the following contents:

We have developed a direct catalytic asym. aldol reaction between α-sulfanyl lactones and aldehydes that is promoted by a chiral Ag/DBU binary catalyst. Chemoselective activation of α-sulfanyl lactones in the presence of aldehyde, made possible through specific coordination of the sulfur atom to the Ag cation, resulted in the preferential enolization of lactones and gave the desired aldol products, e.g., I, with high stereoselectivity. The efficient and stereospecific displacement of the sulfide functionality of the product I facilitated a rapid access to a densely functionalized tertiary alc. in optically active form, which was subsequently used as an intermediate in an enantioselective synthesis of compounds II [R = H (viridiofungin A), CH2CCMe (NA 808)]. The experimental process involved the reaction of tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8COA of Formula: C11H24N2O)

tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8) 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.COA of Formula: C11H24N2O

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

COA of Formula: C7H9NO2SIn 2019 ,《Stereoinversion of Unactivated Alcohols by Tethered Sulfonamides》 appeared in Angewandte Chemie, International Edition. The author of the article were Marcyk, Paul T.; Jefferies, Latisha R.; Abu Salim, Deyaa I.; Pink, Maren; Baik, Mu-Hyun; Cook, Silas P.. The article conveys some information:

A simple iron-based catalyst system for the mild, direct conversion of secondary and tertiary alcs. to sulfonamides was described. Starting from enantioenriched alcs., the intramol. variant proceeded with stereoinversion to produced enantioenriched 2- and 2,2-subsituted pyrrolidines I [R = Me, n-Pr, i-Bu, 4-MeOC6H4] and indolines II [R1 = i-Bu, n-hexyl, CH2(4-MeOC6H4), etc.; Y = H, F, MeO, CF3], without prior derivatization of the alc. or solvolytic conditions. In addition to this study using 4-Methylbenzenesulfonamide, there are many other studies that have used 4-Methylbenzenesulfonamide(cas: 70-55-3COA of Formula: C7H9NO2S) was used in this study.

4-Methylbenzenesulfonamide(cas: 70-55-3) 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).COA of Formula: C7H9NO2S

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