bonds has been accomplished through radical translocation and cross-coupling. Upon irradiation with visible light, copper-based photocatalyst [Cu(Xantphos)(dmp)]BF4 enabled cross-coupling of N-alkoxyphthalimides with amino acid esters or amino acids to provide δ-C(sp3)–H alkylated alcohols (31 examples, up to 92% yield) with additive BNDHP or α-C(sp3)–H alkylated alcohols (18 examples, up to 86% yield)
An organo-photoredox catalyzed gem-difluoroallylation of glycine with α-trifluoromethyl alkenes via direct C(sp3)–H functionalization of glycine and C–F bond activation of α-trifluoromethyl alkenes has been described. As a consequence, a broad range of gem-difluoroalkene-containing unnatural amino acids are afforded in moderate to excellent yields. This reaction exhibits multiple merits such as readily
Herein, we present the first metal-free decarboxylative C(sp3)–C(sp3) cross-coupling of glycine derivatives with redox-active esters through highly atom and energy economical convergent paired electrolysis enabled radical–radical cross-coupling. Under mild and scalable conditions, various α-alkylated unnatural α-amino acids were prepared efficiently from readily available starting materials. The key
35. Degradative studies on peptides and proteins. Part II. Synthesis and properties of 3-benzoyl-1-phenyl-2-thiohydantoin
作者:D. T. Elmore、P. A. Toseland
DOI:10.1039/jr9560000188
日期:——
Co-Catalyzed C(sp<sup>3</sup>)–H Oxidative Coupling of Glycine and Peptide Derivatives
作者:Marcos San Segundo、Itziar Guerrero、Arkaitz Correa
DOI:10.1021/acs.orglett.7b02567
日期:2017.10.6
peptide derivatives are described. These cross-dehydrogenativereactions occur under mild conditions and allow for the rapid assembly of structurally diverse α-amino carbonyl compounds. Unlike enolate chemistry, these methods are distinguished by their site-specificity, occur without racemization of the existing chiral centers, and exhibit total selectivity for aryl glycine motifs over other amino acid