Total Selective Synthesis of Enantiopure <i>O</i><sup>1</sup>-Acyl-3-aminoalkane-1,2-diols by Ring Opening of Aminoepoxides with Carboxylic Acids
作者:José M. Concellón、José Ramón Suárez、Virginia del Solar、Ricardo Llavona
DOI:10.1021/jo0514873
日期:2005.12.1
by ring opening of enantiopure (2R,1‘S)- or (2S,1‘S)-2-(1-aminoalkyl)epoxides 1 or 2, with carboxylic acids in the presence of BF3·Et2O and chlorotrimethylsilane, is described. The conversion takes place with total selectivity and in good yield. In addition, (2R,3S)-O,O-diacyl-3-aminoalkane-1,2-diols 3 were also prepared from reaction of (2R,1‘S)-2-(1-aminoalkyl)epoxides 1 with carboxylic acids under
通过对映纯(2 R,1 'S)-或(2)的开环合成(2 R,3 S)-或(2 S,3 S)-O 1-酰基-3-氨基链烷-1,2-二醇描述了在BF 3 ·Et 2 O和氯代三甲基硅烷存在下与羧酸形成的S,1 'S)-2-(1-氨基烷基)环氧化物1或2。转化以总选择性和高收率进行。此外,(2 R,3 S)-O,O-二酰基-3-氨基烷烃-1,2-二醇3还由(2 R,1 'S)-2-(1-氨基烷基)环氧化物1与羧酸在相同反应条件下且没有氯三甲基硅烷的反应制备。提出了解释这两种转换的机制。