Synthesis-Guided Structure Revision of the Sarcodonin, Sarcoviolin, and Hydnellin Natural Product Family
作者:David W. Lin、Takeshi Masuda、Moritz B. Biskup、Jonathan D. Nelson、Phil S. Baran
DOI:10.1021/jo102228j
日期:2011.2.18
extensive studies aimed at their chemical synthesis. Key features of revised structure 1b include replacement of the N,N-dioxide moiety with an oxime, ring-opening of the central diketopiperazine, and transposition of the terphenyl wing from the 1β−2β position of 1a to the 2β−3β position of 1b. This structure revision arose from the serendipitous synthesis of a benzodioxane aminal (44) whose structure
Synthesis of Small Glycopeptides by Decarboxylative Condensation and Insight into the Reaction Mechanism
作者:Aditya K. Sanki、Rommel S. Talan、Steven J. Sucheck
DOI:10.1021/jo802278w
日期:2009.3.6
believed to result from an intramolecular cyclization of the O-tert-butyl ester on a nitrilium ion intermediate followed by aromatization. A decarboxylativecondensation between O18-labeled phenyl pyruvic acid and N-hydroxyphenethylamine oxalate salt resulted in amide products lacking the O18-label, providing further support for the nitrilium ion in the reaction pathway.
METHOD OF SYNTHESIZING PEPTIDES, PROTEINS AND BIOCONJUGATES
申请人:Nanyang Technological University
公开号:EP2812345A1
公开(公告)日:2014-12-17
[EN] METHOD OF SYNTHESIZING PEPTIDES, PROTEINS AND BIOCONJUGATES<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE PEPTIDES, DE PROTÉINES ET DE BIOCONJUGUÉS
申请人:UNIV NANYANG TECH
公开号:WO2013119184A1
公开(公告)日:2013-08-15
The invention relates to the synthesis of peptides, proteins and related bioconjugates, and in particular, to such synthesis using a peptide ligation method whereby a C-terminal salicylaldehyde ester peptide is reacted with an aminoacyl-N-hydroxl peptide. The invention also relates to the synthesis of cyclic peptides, including serinyl- or threonyl-containing cyclic peptides. The invention further relates to a solid phase synthesis of C-terminal salicylaldehyde ester peptides.
Design of Modified Amine Transfer Reagents Allows the Synthesis of α-Chiral Secondary Amines via CuH-Catalyzed Hydroamination
作者:Dawen Niu、Stephen L. Buchwald
DOI:10.1021/jacs.5b05446
日期:2015.8.5
were used for the synthesis of chiral secondaryamines, competitive, nonproductive consumption of these reagents by the CuH species resulted in poor yields. In this paper, we report the design of a modified type of amine transfer reagent that addresses this limitation. This effort has enabled us to develop a CuH-catalyzed synthesis of chiral secondaryamines using a variety of amine coupling partners,