Flexible Synthesis and Evaluation of Diverse Anti-Apicomplexa Cyclic Peptides
摘要:
A modular approach to synthesize anti-Apicomplexa parasite inhibitors was developed that takes advantage of a pluripotent cyclic tetrapeptide scaffold capable of adjusting appendage and skeletal diversities in only a few steps (one to three steps). The diversification processes make use of selective radical coupling reactions and involve a new example of a reductive carbon nitrogen cleavage reaction with SmI2. The resulting bioactive cyclic peptides have revealed new insights into structural factors that govern selectivity between Apicomplexa parasites such as Toxoplasma and Plasmodium and human cells.
Facile synthesis of d-amino acids from an l-serine-derived aziridine
摘要:
Using the concept that L-serine can be converted into a desymmetrized gamma-diol derivative, five D-amino acids were synthesized from a common aziridine intermediate by a general, high-yielding three-step process. The key 2-t-butyldimethylsiloxymethyl N-t-butoxycarbonyl aziridine intermediate was synthesized in four steps and 65% Overall yield. (C) 1998 Elsevier Science Ltd. All rights reserved.
Ring-rearrangement metathesis of bicyclic amino acid derivatives
作者:Simon Maechling、Sarah E. Norman、John E. McKendrick、Sandeep Basra、Kerstin Köppner、Siegfried Blechert
DOI:10.1016/j.tetlet.2005.10.155
日期:2006.1
In this letter, we describe the ring-rearrangementmetathesis (RRM) of bicyclic amino acid derivatives. The procedure is of use for the synthesis of constrained amino acid and peptide derivatives with potential as reverse-turn inducers.
Practical method for the synthesis of D- or L-.alpha.-amino acids by the alkylation of (+)- or (-)-pseudoephedrine glycinamide.
作者:Andrew G. Myers、James L. Gleason、Taeyoung Yoon
DOI:10.1021/ja00137a034
日期:1995.8
Depeptidized Inhibitors of Hepatitis C Virus NS3 Protease
申请人:Njoroge George F.
公开号:US20070258947A1
公开(公告)日:2007-11-08
The present invention discloses novel depeptidized compounds which have HCV protease inhibitory activity as well as pharmaceutical compositions comprising such compounds and methods of using them to treat disorders associated with the HCV protease.