(4R,5R)-5-{[(2R,3R,4R,5R)-3,4-Bis-(tert-butyl-dimethyl-silanyloxy)-5-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-ylmethyl]-carbamoyl}-2,2-dimethyl-[1,3]dioxolane-4-carboxylic acid 5-methoxymethoxy-pyridin-2-ylmethyl ester 在
三氟乙酸 作用下,
以50%的产率得到(2R,3R)-N-[(2R,3S,4R,5R)-5-(2,4-Dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-3,4-dihydroxy-tetrahydro-furan-2-ylmethyl]-2,3-dihydroxy-succinamic acid 5-hydroxy-pyridin-2-ylmethyl ester