Cu-Catalyzed Site-Selective C(sp<sup>2</sup>)–H Radical Trifluoromethylation of Tryptophan-Containing Peptides
作者:Itziar Guerrero、Arkaitz Correa
DOI:10.1021/acs.orglett.0c00033
日期:2020.3.6
Site-selective functionalization of C-H bonds within a peptide framework poses a challenging task of paramount synthetic relevance. Herein, we report an operationally simple C(sp2)-H trifluoromethylation of tryptophan (Trp)-containing peptides. This fluorination technique is characterized by its chirality preservation, tolerance of functional groups, and scalability and exhibits chemoselectivity for
Gold-catalyzed direct alkynylation of tryptophan in peptides using TIPS-EBX
作者:Gergely L Tolnai、Jonathan P Brand、Jerome Waser
DOI:10.3762/bjoc.12.74
日期:——
biomolecules. In particular, the installation of an alkyne as a useful handle for bioconjugation is highly attractive, but the use of a carbon linker is usually required. Herein, we report the gold-catalyzeddirect alkynylation of tryptophan in peptides using the hypervalent iodine reagent TIPS-EBX (1-[(triisopropylsilyl)ethynyl]-1,2-benziodoxol-3(1H)-one). The reaction proceeded in 50-78% yield under
Azole-fused peptides and processes for preparation thereof
申请人:Sterling Winthrop Inc.
公开号:US05378803A1
公开(公告)日:1995-01-03
Azole-fused peptides useful as Substance P antagonists and analgesics, for example ##STR1## wherein ##STR2## represents ##STR3## wherein X is O, S or NH and * is D, or as intermediates therefor are prepared by azole and peptide forming methods.