Methanesulfonic acid (2R,3R,4R,5R)-5-benzyloxy-4-(tert-butyl-dimethyl-silanyloxy)-2-(tert-butyl-dimethyl-silanyloxymethyl)-3-cyano-tetrahydro-furan-3-yl ester 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
乙腈 为溶剂,
反应 2.0h,
以50%的产率得到(5R,6R,8R,9R)-8-Benzyloxy-9-(tert-butyl-dimethyl-silanyloxy)-6-(tert-butyl-dimethyl-silanyloxymethyl)-2,2-dioxo-1,7-dioxa-2λ
6-thia-spiro[4.4]non-3-en-4-ylamine