Palladium(0)-catalyzed alkylation of various allylic acetates and carbonates by potassium thioacetate allowed an easy access to allylic thioacetates in rather good yields. The reaction was regioselective with substitution at the less hindered side of the intermediate π-allyl system, and diastereoselective with net retention of configuration.
Convergent Synthesis of Peptide Conjugates Using Dehydroalanines for Chemoselective Ligations
作者:Yantao Zhu、Wilfred A. van der Donk
DOI:10.1021/ol015648a
日期:2001.4.1
Protein and peptide conjugates such as glycopeptides, prenylated peptides, and lipopeptides play essential roles in biology, A rapid and convergent entry into a variety of these compounds is described, The methodology involves the introduction of a dehydroalanine into peptides and subsequent chemoselective conjugate addition of an appropriate thiolate nucleophile, including farnesylthiolate or thioglycosides.