Enantiospecific Synthesis of Pyridinones as Versatile Intermediates toward Asymmetric Piperidines
摘要:
The enantiospecific syntheses of pyridinones from amino acids via a gold-catalyzed strategy are reported. Excellent stereocontrol was observed during the cyclization. This approach provides a straightforward tool for further synthetic applications toward piperidines.
An efficient synthesis of cyclic urethanes from Boc-protected amino acids through a metal triflate-catalyzed intramolecular diazocarbonyl insertion reaction
作者:Jae-Chul Jung、Mitchell A. Avery
DOI:10.1016/j.tetlet.2006.08.111
日期:2006.11
A simple and efficient synthesis of cyclic urethanes and related oxazinanones 1a–l from diazoketones 3a–l is described. The transformation involves generation of carbenes by activation of diazo groups using metal triflates in intramolecular diazocarbonyl insertionreactions in high overall yields.
Kinetic deconjugation: a gateway to the synthesis of Xxx-Gly (E)-alkene dipeptide isosteres
作者:Arnaud Proteau-Gagné、Jean-François Nadon、Sylvain Bernard、Brigitte Guérin、Louis Gendron、Yves L. Dory
DOI:10.1016/j.tetlet.2011.09.136
日期:2011.12
A new method for the preparation of Xxx-Gly (E)-alkene dipeptideisosteres (EADIs), using LDA deprotonation followed by 1 N HCl quench, was explored. The method, named kinetic deconjugation, enabled the synthesis of Tyr-Gly, Gly-Gly, Ser-Gly, Pro-Gly, and Phe-Gly EADIs, as well as one Tyr-Gly trisubstituted alkene dipeptideisostere (TADI). Overall, this method, based on commercially available materials
探索了一种新的制备Xxx-Gly(E)-烯烃二肽等排物(EADIs)的方法,该方法使用LDA脱质子化,然后用1 N HCl淬灭。该方法称为动力学解偶联,能够合成Tyr-Gly,Gly-Gly,Ser-Gly,Pro-Gly和Phe-Gly EADIs,以及一种Tyr-Gly三取代烯烃二肽等排物(TADI)。总体而言,该方法基于可商购的材料,可实现高收率,仅需很少的合成步骤,并且可以在多种EADI的合成中达到克级。
Intramolecular N–H insertion of α-diazocarbonyls catalyzed by Cu(acac)2: An efficient route to derivatives of 3-oxoazetidines, 3-oxopyrrolidines and 3-oxopiperidines
作者:Jianbo Wang、Yihua Hou、Peng Wu
DOI:10.1039/a903722e
日期:——
Cu(acac)2 was found to be an efficient catalyst for the intramolecular NâH insertion by carbenoids. The competitive intramolecular CâH insertion by carbenoids is not a problem in the diazo decomposition reaction with Cu(acac)2 as catalyst. The reaction provided derivatives of 3-oxoazetidine, 3-oxopyrrolidine and 3-oxopiperidine in moderate to good yields.
The present invention provides novel compounds and methods useful for treating transglutaminase associated disorders such as celiac spru, Alzheimer's disease and Huntington's disease. Certain compounds of the invention are tissue transglutaminase inhibitors that comprise thiophene moieties. Methods of the invention include treatment of transglutaminase associated disorders with inhibitors of transglutaminase.
Tetrazole Diversification of Amino Acids and Peptides via Silver‐Catalyzed Intermolecular Cycloaddition with Aryldiazonium Salts
作者:Xuan‐Yu Liu、Yi‐Lin Yang、Yanfeng Dang、Ilan Marek、Fa‐Guang Zhang、Jun‐An Ma
DOI:10.1002/anie.202304740
日期:2023.9.11
A general synthetic platform that could transform proteinogenic α-amino acids into a plethora of unprecedented tetrazole-decorated aminoacid derivatives is developed via a silver-catalyzed intermolecular cycloaddition reaction with aryldiazonium salts.