作者:D. de Wit、L. M. A. van Unen、F. van Rantwijk、L. Maat、A. P. G. Kieboom
DOI:10.1002/recl.19921111003
日期:——
unprotected 3-ketoglucose (1) with hydrazines to 4-pyrazolols has been investigated. 3- (5) and 5-(D-erythro-1,2,3-trihydroxypropyl)-4-pyrazolol (4) were obtained from 1 in high yield, as a mixture of these two isomers. A regioselective route starting from protected 1 in two steps yielded a mixture of diastereomers as a result of epimerization in the side chain.
已经研究了保护的和未保护的3-酮葡萄糖(1)与肼的缩合成4-吡唑醇。从这两种异构体的混合物中,以高收率从1获得3-(5)和5-(D-赤型-1,2,3-三羟丙基)-4-吡唑醇(4)。从受保护的1开始的区域选择性路线分两步产生,由于侧链中的差向异构化,产生了非对映异构体的混合物。