(E) 2(dimethylphosphato, dimethylphosphono)methylene-4<(4-oxo-4H-1-benzopyran-2-yl)carbonyloxy>2H-1-benzopyran 以
苯 为溶剂,
反应 24.0h,
以57.5%的产率得到(Z) 2(dimethylphosphato, dimethylphosphono)methylene-4<(4-oxo-4H-1-benzopyran-2-yl)carbonyloxy>2H-1-benzopyran