Protecting carbohydrates with ethers, acetals and orthoesters under basic conditions
作者:Yang Liang、Christian M. Pedersen
DOI:10.1039/d1ob01467f
日期:——
Chlorinated ethyl and vinyl ethers are introduced at various positions of carbohydrates. Depending on the relative stereochemistry, vinylethers, acetals or orthoesters are formed underbasicconditions. The products are stable, but are easily deprotected after dechlorination. The scope of the intramolecular protection is studied using common pentoses and hexoses.
Labile (+)-6-tuliposide B, an antimicrobial compound produced by tulip, was synthesized in nine steps from D-glucose via the Baylis-Hillman reaction of 2-(tert-butyldimethylsilyloxy)-acetaldehyde with 6-O-acryloyl-1-O-(2-trimethylsilylethyl)-beta-D-glucopyranoside, followed by a mild deprotection procedure using TFA in CH2Cl2. (C) 2008 Elsevier Ltd. All rights reserved.
TAKANO, TOSHIYUKI;HARADA, YOSHIKO;NAKATSUBO, FUMIAKI;MURAKAMI, KOJI, MOKUDZAJ GAKKAJSI, 36,(1990) N, S. 212-217
作者:TAKANO, TOSHIYUKI、HARADA, YOSHIKO、NAKATSUBO, FUMIAKI、MURAKAMI, KOJI
DOI:——
日期:——
Miller, Contributions from Boyce Thompson Institute, 1942, vol. 12, p. 465,466, 468