Unexpected O-alkylation and ester migration in phenolic 2,3-diaryl-2,3-dihydrobenzo[b]furans
作者:Henry Tran、Benjamin D. Dickson、David Barker
DOI:10.1016/j.tetlet.2013.02.024
日期:2013.4
O-alkylation of 2-(4-methoxyphenyl)-5-hydroxy-3-[1,3-phenylene-bis(4-nitrobenzoate)]-2,3-dihydrobenzo[b]furan results in the unexpected hydrolysis of the nitrobenzoate esters, transfer of a 4-nitrobenzoic acid group to the 5-hydroxyl group and double alkylation of the newly formed 3,5-diphenol moiety. A range of alkyl halides can be used and give access to O-alkyl analogues of ε-viniferin.
2-(4-甲氧基苯基)-5-羟基-3- [1,3-亚苯基-双(4-硝基苯甲酸酯)]-2,3-二氢苯并[ b ]呋喃的O-烷基化导致硝基苯甲酸酯的意外水解酯,将4-硝基苯甲酸基团转移到5-羟基基团上,以及新形成的3,5-二酚部分的双烷基化。可以使用一系列卤代烷,并且可以得到ε-葡萄素的O-烷基类似物。