A simple and efficient method for the synthesis of unsaturated branched-chain sugars in aqueous media has been achieved using a palladium-catalyzed Heck-type reaction, and unprotected substrate can also be used in these reactions.
利用钯催化的赫克型反应,实现了在水介质中合成不饱和支链糖的简单而高效的方法。
C-Glycosidation of unprotected d-glycals with trimethylsilyl cyanide
Unprotected glycals smoothly react with trimethylsilyl cyanide in the presence of a catalytic amount of Pd(OAc)(2) to yield the corresponding unprotected glycosyl cyanides in high yield. (C) 1999 Elsevier Science Ltd. All rights reserved.
Hybrids of sugars and aromatics: A Pd-catalyzed modular approach to chromans and isochromans
作者:Markus Leibeling、Dennis C. Koester、Martin Pawliczek、Daniel Kratzert、Birger Dittrich、Daniel B. Werz
DOI:10.1016/j.bmc.2010.03.004
日期:2010.6.1
of our synthetic approach is the annelation of the benzene moiety via a highly efficient Pd-catalyzed domino reaction. This powerful approach led to a small library of highly substituted chromans and isochromans by making use of a variety of different diynes and bromoglycals. We investigated several Pd-catalysts in order to improve the yields and to enlarge the scope of the domino reaction. Furthermore
Intermolecular Twofold Carbopalladation/Cyclization Sequence to Access Chromans and Isochromans from Carbohydrates
作者:Markus Leibeling、Bastian Milde、Daniel Kratzert、Dietmar Stalke、Daniel B. Werz
DOI:10.1002/chem.201101917
日期:2011.8.29
Fuse it! An intermolecular Pd‐catalyzed domino process leading to chromans and isochromans is reported (see scheme). A bromoglycal derived from monosaccharides and two alkyne units set the stage for the benzene annelation.