Ring contraction of 2,5-diketopiperazines by TRAL-alkylation led us to the stereoselectivesynthesis of original pyrrolidine-2,4-diones, a novel series of promising molecules with moderate anti-proliferative activity on breast cancer cells.
A flow reactor process for the synthesis of peptides utilizing immobilized reagents, scavengers and catch and release protocols
作者:Ian R. Baxendale、Steven V. Ley、Christopher D. Smith、Geoffrey K. Tranmer
DOI:10.1039/b612197g
日期:——
A general flow process for the multi-step assembly of peptides has been developed and this procedure has been used to successfully construct a series of Boc, Cbz and Fmoc N-protected dipeptides in excellent yields and purities, including an extension of the method to enable the preparation of a tripeptide derivative.
作者:Jorge Gómez-Carpintero、J. Domingo Sánchez、J. Francisco González、J. Carlos Menéndez
DOI:10.1021/acs.joc.1c02350
日期:2021.10.15
aliphatic esters with ethanol and calcium nitride afforded the corresponding primaryamides in a transformation that was compatible with a variety of functional groups and maintained the integrity of a stereocenter α to carbonyl. This methodology was applied to α-amino esters and N-BOC dipeptide esters and also to the synthesis of rufinamide, an antiepileptic drug.
The reaction of several α-aminoacids and peptides (containing Gly, L-Ala, L-Leu, L- or DL-Phe, and/or L- or D-Val) with air-diluted nitrogen oxides has been studied to roughly mimic the N-nitrosation of peptide bonds that the contaminated urban air might produce in pulmonary tissues. Most N-protected α-aminoacids give practically quantitative yields of N-nitroso derivatives. N-Protected dipeptides
已经研究了几种α-氨基酸和多肽(包含Gly,L-Ala,L-Leu,L-或DL-Phe和/或L-或D-Val)与空气稀释的氮氧化物的反应模拟被污染的城市空气可能在肺组织中产生的肽键的N-亚硝化。大多数N-保护的α-氨基酸可提供定量的N-亚硝基衍生物。受N保护的二肽提供二亚硝化肽,二亚硝化化合物和单亚硝化化合物的混合物,选择性单亚硝化产物,或根本不发生反应,这主要取决于空间效应。对于一些更高的肽,观察到相同的趋势。保留了原料的手性的(多)亚硝化肽的特征是1 H和13在温和的条件下,经吡咯烷和氨基酯裂解,得到13 C NMR光谱,得到(新的)酰胺或肽以及重氮衍生物。
Ethyl Propiolate: A Simple and Convenient Peptide Coupling Reagent
作者:Jean-Marc Campagne、Bogdan Iorga
DOI:10.1055/s-2004-829553
日期:——
Ethylpropiolate has been used to activate N-protected amino acids to form a moderately activated vinyl-ester which aminolysis requires a catalytic amount of sodium bisulfite.