Primary, secondary and electron-deficient tertiary alcohols react rapidly with ketene dimethyl acetal to form mixed ortho esters, without catalysts and under solvent-free conditions. 1,2-Diols yield bis(mixed ortho esters), rather than cyclic ortho esters.
一级、二级及缺电子
三级醇可快速与
乙烯酮二
甲缩醛反应,生成混合原酸酯,无需催化剂且在无溶剂条件下进行。1,2
-二醇生成双(混合原酸酯),而非环状原酸酯。