2-Diazo-malonic acid (2R,3S,5R)-5-(4-amino-2-oxo-2H-pyrimidin-1-yl)-2-(tert-butyl-diphenyl-silanyloxymethyl)-tetrahydro-furan-3-yl ester methyl ester 在
dirhodium tetraacetate 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以71%的产率得到(3S,3aR,4R,6R,6aS)-4-(4-Amino-2-oxo-2H-pyrimidin-1-yl)-6-(tert-butyl-diphenyl-silanyloxymethyl)-2-oxo-hexahydro-furo[3,4-b]furan-3-carboxylic acid methyl ester