Radical addition to the carbonyl carbon of ketones promoted by aqueos titanium trichloride in acidic medium, one step synthesis of pinacols and lactones
作者:Angelo Clerici、Ombretta Porta、Pasquale Zago
DOI:10.1016/s0040-4020(01)87455-x
日期:1986.1
Carbon centered radical , generated by reduction of methyl phenyl-glyoxalate with Ti(III) ion, adds to the carbonyl carbon of ketones to afford pinacols . Yields of are remarkably influenced by the structure of , in that the reaction is very sensitive to steric factors. Many other functional groups present in do not interfere with carbonyl addition, but lactonization of occurs when the additional groups
通过用Ti(III)离子还原乙二醛基苯基乙二酸甲酯生成的以碳为中心的自由基加到酮的羰基碳上,得到频哪醇。的结构会显着影响的收率,因为该反应对空间因素非常敏感。存在的许多其他官能团不会干扰羰基的加成,但是当另外的基团是COOH,COOC 2 H 5和OH时,会发生内酯化。