potassium cyanate 、 (3R,4S,5R)-2-Amino-3,4-bis-(tert-butyl-dimethyl-silanyloxy)-5-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-tetrahydro-furan-2-carboxylic acid methyl ester 在
溶剂黄146 作用下,
反应 1.5h,
以26%的产率得到(2R,3R,4S,5R)-3,4-Bis-(tert-butyl-dimethyl-silanyloxy)-5-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2-ureido-tetrahydro-furan-2-carboxylic acid methyl ester