名称:
Di-2,2,2-trifluoro-1-(9-anthryl)ethyl fumarate, an easy starting point for the enantioselective preparation of trans-cyclohexene-4,5-dicarboxylate derivatives by Diels–Alder reaction
摘要:
Di-2,2,2-trifluoro-1-(9-anthryl)ethyl fumarate has been synthesized from fumaric acid and enantiopure Pirkle alcohol. The Diels-Alder reaction with different dienes employing different reaction conditions was assayed, with high diastereomeric excesses obtained. The structure and geometry of the cycloadducts was analyzed by NMR, molecular mechanics and X-ray diffraction. Hydrolysis made it possible to obtain the enantioenriched trans-cyclohexene-4,5-dicarboxylate derivatives and allow us to recover chiral auxiliary. (c) 2007 Elsevier Ltd. All rights reserved.
DOI:
10.1016/j.tetasy.2006.11.047