Ring opening of chiral 2-(1-aminoalkyl)epoxides by aliphatic thiols with total selectivity: synthesis of enantiopure 3-amino-1-(alkylthio)alkan-2-ols
作者:José M. Concellón、Virginia del Solar、José Ramón Suárez、Elena G. Blanco
DOI:10.1016/j.tet.2007.01.052
日期:2007.3
We have studied the thiolysis of (2R,1′S)- or (2S,1′S)-2-(1-aminoalkyl)epoxides 1 or 2 in the presence of BF3·OEt2. The ring opening took place at C-3 with complete regioselectivity, affording the corresponding enantiopure (2R,3S)- or (2S,3S)-3-amino-1-(alkylthio)alkan-2-ols 3 or 4 in good or high yield. The structures of compounds 3 and 4 have been proposed based on HMBC NMR experiments.
我们研究了在BF 3 ·OEt 2存在下(2 R,1 'S)-或(2 S,1 'S)-2-(1-氨基烷基)环氧化物1或2的硫解。开环发生在C-3处,具有完全的区域选择性,得到相应的对映纯(2 R,3 S)-或(2 S,3 S)-3-氨基-1-(烷硫基)烷-2-醇3或4高产或高产。基于HMBC NMR实验已经提出了化合物3和4的结构。