azido 6-O-benzyl-3,4-O-isopropylidene-β-D-ribo-2-hexosulofuranoside;(3aR,4S,6R,6aR)-4-azido-2,2-dimethyl-6-(phenylmethoxymethyl)-6,6a-dihydro-3aH-furo[3,4-d][1,3]dioxole-4-carbaldehyde
Synthetic studies on (+)-hydantocidin (3): a new synthetic method for construction of the spiro-hydantoin ring at the anomeric position of D-ribofuranose
作者:Shigeru Mio、Yuko Kumagawa、Soji Sugai
DOI:10.1016/s0040-4020(01)96124-1
日期:——
A facilesynthetic route for the large-scale preparation of a herbicidal natural product, (+)-hydantocidin is described. The protected D-psicose 6, prepared in five steps from D-fructose, was stereospecifically converted to azido-amide 14 by N-glycosidation (TMSN3/TMSOTf), oxidation and amination. Hydantoin ring-construction on 14 was achieved by aza-Wittig reaction (PBu3/CO2/CH3CN) to give 16 without