Simple syntheses of L-fucopyranose and fucosidase inhibitors utilizing the highly stereoselective methylation of an arabinofuranoside 5-urose derivative
作者:Shunya Takahashi、Hiroyoshi Kuzuhara
DOI:10.1039/a606564c
日期:——
The simple syntheses of L-fucopyranose 1 and its three
analogues 2–4 are described. A key reaction is a stereocontrolled
elongation by one carbon unit at the side chain of an
α-D-arabino-pentodialdo-1,4-furanoside 9 with
MeMgI–ZnCl2 or Me3Al. Diastereofacial
selectivities of more than 92% were achieved.
简单报道了L-岩藻吡喃糖1及其三种类似物2-4的合成方法。关键反应是用MeMgI-ZnCl2或Me3Al在α-D-阿拉伯吡喃型戊二醛-1,4-呋喃糖9的侧链上进行立体控制的碳链延长一碳单位的反应。得到的手性面选择性超过92%。