Stereoselective synthesis of dominicalure 1 and 2: Components of aggregation pheromone from male lesser grain borerRhyzopertha dominica (F.)
作者:J. Razkin、P. Gil、A. Gonzalez
DOI:10.1007/bf02033577
日期:1996.4
Dominicalure 1 (9a) and dominicalure 2 (9b), were synthesized by esterification of alpha,beta-unsaturated acids4a and4b with (S)-(+)-2-pentanol (8). The key step was the asymmetric reduction of 3-penten-2-one (5) to give the chiral intermediate6, which, upon diimide reduction, DNB derivatization, recrystallization, and hydrolysis, yielded8 in 63% ee. Acids4a and4b were prepared in a simple and efficient
Dominicalure 1 (9a) 和 dominicalure 2 (9b) 是通过 α,β-不饱和酸 4a 和 4b 与 (S)-(+)-2-戊醇 (8) 酯化合成的。关键步骤是 3-penten-2-one (5) 的不对称还原得到手性中间体 6,在二酰亚胺还原、DNB 衍生化、重结晶和水解后,得到 63% ee 的 8。酸 4a 和 4b 以简单有效的三步合成法制备,总收率分别为 54% 和 62%,呈立体异构纯形式。