Remote functionalization: Cyclic alkoxylation onto aromatic ring via radical pathway
作者:Takahito Muraki、Hideo Togo、Masataka Yokoyama
DOI:10.1016/0040-4039(96)00313-9
日期:1996.4
Oxidative cyclization of alcohols containing an aromaticring with (diacetoxyiodo)benzene and iodine gave the corresponding cyclic ethers via alkoxy radicals in good yields. The present method is very useful for the direct preparation of flavonoid and vitamin E analogues from the alcohols.
intermolecular sp3-sp3 C-C bondformationbetween primary aliphatic alcohol and olefin by use of a RhCl(PPh3)3 (cat.)/BF3.OEt2 (2.5 equiv)/BuBr (0.5 equiv)/toluene system was first disclosed, which possessed quite significant utilities for organic synthesis, especially for that of secondary alcohols. The most significant aspect is the discovery that rhodium-catalyzed C-H bond activation of alcohols is