Development of a Highly β-Selective Ribosylation Reaction without Using Neighboring Group Participation: Total Synthesis of (+)-Caprazol, a Core Structure of Caprazamycins
作者:Shinpei Hirano、Satoshi Ichikawa、Akira Matsuda
DOI:10.1021/jo701699h
日期:2007.12.1
(+)-caprazol are described. The key elements of our approach include the early stage introduction of the aminoribose in a highly β-selective manner, using the steric hindrance in the transition state and the construction of the diazepanone by a modified intramolecular reductive amination. The 5‘-C-glycyluridine derivative 9, which was prepared stereoselectively via Sharpless asymmetric aminohydroxylation,