2-Hydroxy-1,2,2-triphenylethanone as an efficient photolabile protecting group for carboxylic acids
作者:M. Arfan Ashraf、Alexander G. Russell、Christopher W. Wharton、John S. Snaith
DOI:10.1016/j.tet.2006.11.015
日期:2007.1
The synthesis is reported of 2-hydroxy-1,2,2-triphenylethanone esters of carboxylic acids by the reaction between 2-chloro-1,2,2-triphenylethanone and a carboxylic acid in the presence of silver carbonate and silver tetrafluoroborate. Photolysis of the esters occurs rapidly on irradiation with a medium-pressure mercury lamp through quartz or Pyrex to return the carboxylic acid. The side product of
据报道,在碳酸银和四氟硼酸银的存在下,通过2-氯-1,2,2-三苯乙酮与羧酸的反应合成了羧酸的2-羟基-1,2,2-三苯乙酮酯。酯的光解在中压汞灯照射下通过石英或派热克斯玻璃迅速发生,以返回羧酸。光解的副产物是苯并[ b ]菲并[9,10- d ]呋喃,它是通过串联过程形成的,该过程涉及2,3-二苯基苯并呋喃的初始生成,光化学环化和通过空气氧化的重新芳构化。