Enantiospecific synthesis of substituted bicyclo[2.1.1]hexane-1-carboxylic acids and esters
作者:A.García Martínez、E.Teso Vilar、J.Osío Barcina、M.E.Rodriguez Herrero、S.de la Moya Cerero、M. Hanack、L.R. Subramanian
DOI:10.1016/s0957-4166(00)80096-8
日期:1993.11
The base promoted ring contraction of the readily accessible homochiral 2-oxo-1-norbornyl inflates 3 in 60% ethanol takes place with formation of bicyclo[2.1.1]hexane (4a), (+)- or (−)-7,7-dimethyl-bicyclo[2.1.1]hexan-1-carboxylic acids (4c or 4b) and the corresponding ethyl esters in good yields.
在60%的乙醇中,易于获得的同手性2-氧代-1-降冰片基膨胀3的碱促进的环收缩发生,形成双环[2.1.1]己烷(4a),(+)-或(-)-7, 7-二甲基-双环[2.1.1]己-1-羧酸(4c或4b)和相应的乙酯收率很高。