Approach to a better understanding and modeling of (S)-dihydrofuran-2-yl, (S)-tetrahydrofuran-2-yl-, and furan-2-yl-β-dialkylaminoethanol ligands for enantioselective alkylation
作者:Claudio Paolucci、Goffredo Rosini
DOI:10.1016/j.tetasy.2007.11.034
日期:2007.12
derivatives used as ligands for catalysts in the asymmetric alkylation of aldehydes. Thirty-four enantiomerically pure (S)-dihydrofuran-2-yl, (S)-tetrahydrofuran-2-yl-, and furan-2-yl-β-dialkylamino alcohols have been prepared from 1,4:3,6-dianhydromannitol, 1,4:3,6-dianhydrosorbitol, and aminoacids, and then have been evaluated as ligands for the enantioselective addition of diethylzinc to benzaldehyde. Attention
本文概述了我们的工作,以研究与β-氨基醇衍生物的立体异构中心相邻的氧原子的作用,该β-氨基醇衍生物用作醛的不对称烷基化催化剂的配体。由1,4:3,6-二脱水甘露糖醇制备了34种对映体纯的(S)-二氢呋喃-2-基,(S)-四氢呋喃-2-基和呋喃-2-基-β-二烷基氨基醇,1,4:3,6-二脱水山梨糖醇和氨基酸,然后已被评估为将二乙基锌对苯甲醛对映选择性加成的配体。注意力已集中在控制手性诱导程度,反应速率和1-苯基-1-丙醇的化学收率上的结构特征上,该特征已被广泛收集的β-二烷基氨基醇所促进。