Stereoselectivities in the reactions of α-d-hexopyranosid-4-uloses with diazomethane
作者:Ken-Ichi Sato、Juji Yoshimura
DOI:10.1016/s0008-6215(00)80685-0
日期:1982.5
Abstract The stereoselectivities in the reactions of diazomethane with various α- d -hexopyranosid-4-uloses are compared with those in Grignard reactions. The results support the hypothesis that the stereoselectivity of the diazomethane reaction is mainly controlled by the attractive, electrostatic force between the diazomethyl cation and a neighbouring, axial oxygen or the axial lone-pair electrons
摘要比较了重氮甲烷与各种α-d-己基吡喃糖苷-4-纤维素反应的立体选择性和格氏反应中的立体选择性。该结果支持以下假设:重氮甲烷反应的立体选择性主要受重氮甲基阳离子与过渡态中O-5的相邻轴向氧或轴向孤对电子之间的吸引力,静电力控制。