Regioselective Control of 1,2- Versus 1,4-Addition in Organocatalytic Reactions of o-Hydroxycinnamaldehydes with Organoboronic Acids
作者:Sung-Gon Kim、Kwang-Su Choi
DOI:10.1055/s-0030-1258268
日期:2010.12
The regioselective 1,2-addition and 1,4-addition reactions of o-hydroxycinnamaldehydes with organoboronic acids in the presence of organocatalysts gave 2-substituted 2H-chromenes and 4-substituted chroman-2-ols, respectively. Diethylamine was used as the catalyst for the 1,4-addition reaction, whereas dibenzylamine and trichloroacetic acid were used as the catalyst and additive, respectively, in the