2H-benzo[b]thiete 、 [(Z)-[(3aS,6R,6aS)-6-(2,2-dimethyl-1,3-dioxolan-4-yl)-2,2-dimethyl-6,6a-dihydro-3aH-furo[3,4-d][1,3]dioxol-4-ylidene]amino] acetate 以
甲苯 为溶剂,
反应 5.0h,
以9%的产率得到3-Acetoxy-3,4-dihydro-3',3'-dimethyl-8'(2,2-dimethyl-1,3-dioxolan-4-yl)spiro<2H-1,3-benzothiazin-2,6'-(2',4',7')-trioxabicyclo<3.3.0>octan>