yielded the required bicyclic skeletonswith high regio-preference and excellent threo-selectivity (concerning the newly formed stereocentreat C-3) [4,5], Grignard addition of phenyl magnesium bromide to 6a in tetrahydrofuran led to twodiastereomeric alcohols 7a and 8a in a 1:3 ratio favouring formation of the L-ido diastereomer 8a,possessing the correct stereochemistry for less cytotoxic 7-epi-goniofufurone
Tibor Gracza* 和 Peter Szolcsanyi 斯洛伐克理工大学
化学技术学院有机
化学系,斯洛伐克布拉迪斯拉发 Sk-812 37。电话。(0421) 7 59325 167,传真 (0421) 7 529 68 560,http://www.chtf.stuba.sk/KATEDRY/koch/new_gracza.htm* 通讯作者。?-mail gracza@chtf.stuba.sk.Received: 2 August 2000 / Accepted: 8 December 2000 / Published: 21 December 2000 摘要:将有机
金属试剂添加到 1,2-O-异亚丙基-OR-α- 的非对映选择性研究了 D-xylopentodialdo-1,4-
呋喃糖 (6)。关键词: 有机
金属试剂, 立体选择性, 羰基的加成。 简介 角
呋喃酮 (+)-1