Stereoselective Palladium-Catalyzed Alkenylation and Alkynylation of Thioglycosides
作者:Etienne Brachet、Jean-Daniel Brion、Mouad Alami、Samir Messaoudi
DOI:10.1002/adsc.201300419
日期:2013.9.16
An efficient and unprecedented palladium‐catalyzed S‐glycosylation reaction of a range of alkenyl and alkynyl halides by using thiosugars as nucleophile partners has been established. With palladium diacetate in combination with Xantphos as the catalytic system, a variety of β‐alkenylthioglycosides as well as β‐alkynylthioglycosides can be prepared in good to excellent yields. The efficiency of this
通过使用硫糖作为亲核试剂的伙伴,已经建立了有效且前所未有的钯催化的一系列链烯基和炔基卤化物的S-糖基化反应。将二乙酸钯与Xantphos结合用作催化体系,可以制备各种β-烯基硫代糖苷以及β-炔基硫代糖苷,而且收率很高。叶片封闭的β-葡萄糖苷酶抑制剂的正式合成充分证明了该通用方案的有效性。