Efficient stereoselective synthesis of a 1-hydroxymethyl-2-methylglycidol derivative
摘要:
A highly stereoselective synthesis of (2R.3S)-3,4-epoxy-3-methyl-1-(triphenylmethyl)oxybutan-2-ol 3, which is a substructure Found in some naturally-occurring bioactive compounds. was achieved starting from commercially available 3-methhyl-2-buten-1-ol 4 in three steps, using two applications of the Sharpless asymmetric epoxidation as the key stereochemistry establishing reactions. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis of the methyl ester of AK-toxin II, a host-specific toxin to Japanese white pear, and its congeners: Structure-toxicity relationship of the toxin.
Synthesis of the methyl ester of AK-toxin II, a typical host-specific toxin, toxic to Japanese white pear, and fifteen diastereoisomers as its congeners was accomplished in optically active forms starting from vitamin C as a chiral starting material. Toxicity testing of these synthetic compounds revealed that the configurations of two chiral centers in the carboxylic acid part of the toxin have an important role in the toxicity.
以维生素 C 为手性起始材料,以光学活性形式合成了 AK 毒素 II(一种典型的宿主特异性毒素,对日本白梨有毒)的甲酯及其 15 种非对映异构体同系物。对这些合成化合物的毒性测试表明,毒素羧酸部分的两个手性中心的构型对毒性有重要影响。