Reduction of benzylic alcohols and α-hydroxycarbonyl compounds by hydriodic acid in a biphasic reaction medium
作者:Michael Dobmeier、Josef M Herrmann、Dieter Lenoir、Burkhard König
DOI:10.3762/bjoc.8.36
日期:——
was improved to be more applicable to organic synthesis. Instead of a strongly acidic, aqueous solution, a biphasic toluene-water reaction medium was used, which allowed the conversion of primary, secondary and tertiary benzylic alcohols, in good yields and short reaction times, into the corresponding hydrocarbons. Red phosphorous was used as the stoichiometric reducing agent. Keto, ester, amide or
Kiliani 在 140 多年前首次描述的使用氢碘酸将醇还原为烃的合成方案经过改进,使其更适用于有机合成。使用双相甲苯-水反应介质代替强酸性水溶液,这使得伯、仲和叔苄醇以良好的产率和较短的反应时间转化为相应的烃。红磷用作化学计量还原剂。酮基、酯基、酰胺基或醚基是可以耐受的,并且在 0.6 当量磷存在下催化量的氢碘酸(0.2 当量)足以实现转化。