from the results observed with strained and sterically hindered syn 1,2-diols, which undergo oxidative cleavage via a 12-I-5 spirobicyclic periodinane. The use of TFA, a protonating solvent, promotes the formation of the 12-I-5 intermediate for 1,2-diols of all types (sec,sec, sec,tert and tert,tert), leading to efficient oxidative fragmentation.
Photo-Fries reaction in water made selective with a capsule
作者:Lakshmi S. Kaanumalle、Corinne L. D. Gibb、Bruce C. Gibb、V. Ramamurthy
DOI:10.1039/b617022f
日期:——
The water soluble capsule formed by a deep cavity cavitand with eight carboxylic acid groups controls product distribution during photo-Fries rearrangement of naphthyl esters in water by restricting the mobility of primary singletradical pair.