Photochemical Synthesis of 4-Oxobutanal Acetals and of 2-Hydroxycyclobutanone Ketals
作者:Cristina Manfrotto、Mariella Mella、Mauro Freccero、Maurizio Fagnoni、Angelo Albini
DOI:10.1021/jo982053t
日期:1999.7.1
substituted) in 1,3-dioxolane in the presence of a sensitizer (benzophenone or anthraquinone) led to 4-oxobutanal acetals in fair to excellent yield through a very simple procedure (workup in most cases by bulb-to-bulb distillation). The resulting acetals were irradiated to give 2-hydroxycyclobutanone ketals, again through a simple procedure that gave a good yield with open-chain aliphatic derivatives.
在敏化剂(二苯甲酮或蒽醌)存在下,在 1,3-二氧戊环中辐照 1,3-二氧戊环中的 α,β-不饱和酮(脂肪族、开链和环状以及芳基取代的)导致 4-氧代丁醛缩醛的产率相当到极好通过一个非常简单的程序(在大多数情况下通过球对球蒸馏进行处理)。所得的缩醛经辐照得到 2-羟基环丁酮缩酮,同样通过一个简单的程序得到了开链脂肪族衍生物的良好收率。