Cross metathesis of β-carotene with electron-deficient dienes. A direct route to retinoids
作者:Agnieszka Wojtkielewicz、Jadwiga Maj、Jacek W. Morzycki
DOI:10.1016/j.tetlet.2009.06.032
日期:2009.8
Cross metathesis (CM) reactions of beta-carotene and alkenes occur regioselectively in the presence of the Hoveyda second generation catalyst. Scission of the C15-C15' and C11-C12 bonds of P-carotene in all CM reactions predominates. The reaction with ethyl (2E,4E/Z)-3-methylhexa-2,4-dienoate is both regio and diastereoselective, and affords ethyl all-trans-retinoate as the major product, if suitable CM conditions are applied. (C) 2009 Elsevier Ltd. All rights reserved.