Stereoselective Syntheses of the 2-Isopropenyl-2,3-dihydrobenzofuran Nucleus: Potential Chiral Building Blocks for the Syntheses of Tremetone, Hydroxytremetone, and Rotenone
作者:Stephen C. Pelly、Sameshnee Govender、Manuel A. Fernandes、Hans-Günther Schmalz、Charles B. de Koning
DOI:10.1021/jo062447h
日期:2007.4.1
The first enantioselective synthesis of the 2-isopropenyl-2,3-dihydrobenzofuran skeleton of tremetone and hydroxytremetone from (E)-4-(2-hydroxyphenyl)-2-methyl-2-butenyl methyl carbonate and (E)-4-(2,6-dihydroxyphenyl)-2-methyl-2-butenyl methyl carbonate, respectively, is described. The key step is a catalytic palladium-mediated reaction in the presence of the chiral Trost ligand.
从(E)-4-(2-羟苯基)-2-甲基-2-丁烯基甲基碳酸酯和(E)-4-(分别描述了2,6-二羟基苯基)-2-甲基-2-丁烯基碳酸甲酯。关键步骤是在手性Trost配体存在下催化钯介导的反应。