(3a
R)-6-formyl-5
t,7a-dihydroxy-2,2-dimethyl-(3a
r,4a
t,7a
t,7b
c)-hexahydro-[1,3]dioxolo[4',5':4,5]furo[2,3-
c]pyrrole-7
t-carboxylic acid ethyl ester 在
吡啶 、
四氯化锡 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 44.0h,
生成
(3aR)-6t-acetoxy-4c-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-7-formyl-2,2-dimethyl-(3ar,5at,8atO)-hexahydro-[1,3]dioxolo[4',5':3,4]furo[2,3-c]pyrrole-8t-carboxylic acid ethyl ester