Benzoic acid (2R,3S,5R)-2-{2-[(1,1-diethoxy-ethyl)-ethoxy-phosphinoyl]-ethyl}-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-yl ester 在
咪唑 、
sodium methylate 作用下,
以
甲醇 、
N,N-二甲基甲酰胺 为溶剂,
生成
{2-[(2R,3S,5R)-3-(tert-Butyl-diphenyl-silanyloxy)-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-yl]-ethyl}-(1,1-diethoxy-ethyl)-phosphinic acid ethyl ester