叔丁基乙烯基醚 、
(E)-2-Diethoxyphosphoryl-4-(4-nitrophenyl)but-3-en-2-one 反应 4.0h,
生成 trans-2-tert-Butoxy-5-(diethoxyphosphoryl)-3,4-dihydro-6-methyl-4-(4-nitrophenyl)-2H-pyran 、 cis-2-tert-Butoxy-5-(diethoxyphosphoryl)-3,4-dihydro-6-methyl-4-(4-nitrophenyl)-2H-pyran