乙酸酐 、 Acetic acid (1S,2R,3S,4S,5R)-4-acetoxy-2-((3aR,4S,9aR,9bS)-2,2,8,8-tetramethyl-4,6,9a,9b-tetrahydro-3aH-[1,3]dioxolo[4',5':3,4]benzo[1,2-d][1,3]dioxin-4-ylamino)-6,8-dioxa-bicyclo[3.2.1]oct-3-yl ester 在
硫酸 、
溶剂黄146 作用下,
以85%的产率得到4-deoxy-4-<<(1S)-(1,4/5,6)-4,5,6-trihydroxy-3-hydroxymethyl-2-cyclohexen-1-yl>amino>-D-mannopyranose octaacetate