A simple and efficient synthesis of enantiomeric (3aRS,4RS,6aSR)-4-hydroxy-3,3a,4,6a-tetrahydro-1H-cyclopenta[c]furan-1-ones
作者:Airat M. Gimazetdinov、Salavat S. Gataullin、Ivan S. Bushmarinov、Mansur S. Miftakhov
DOI:10.1016/j.tet.2012.05.036
日期:2012.7
0]hept-2-en-6-one by treatment with (+)-α-methylbenzylamine were transformed into bicyclic lactam-aminals, which can easily be separated by column chromatography on SiO2. The latter products lead to enantiomeric (3a,6a)-4-hydroxy-3,3a,4,6a-tetrahydro-1H-cyclopenta[c]furan-1-ones after the removal of the chiral auxiliary and epoxidation.
通过用(+)-α-甲基苄基胺处理,将易获得的(±)-7,7-dichloro-4- exo-三甲基甲硅烷基双环[3.2.0] hept-2-en-6-one裂解产生的非对映异构酰胺被转化生成双环内酰胺缩醛,可通过SiO 2柱色谱法轻松分离。在除去手性助剂并环氧化后,后者产物产生对映体(3a,6a)-4-羟基-3,3a,4,6a-四氢-1 H-环戊[ c ]呋喃-1-酮。