作者:Yoshihiro Sohtome、Aya Tanatani、Yuichi Hashimoto、Kazuo Nagasawa
DOI:10.1248/cpb.52.477
日期:——
Chiral urea compounds 10a—g were synthesized as catalysts for conjugate addition of pyrrolidine (2) to γ-crotonolactone (3). In the presence of a catalytic amount of the chiral ureas, this hetero-Michael reaction was greatly accelerated. Asymmetric induction was observed with the catalysts 10e, 10f, and 10g.
手性脲化合物 10a-g 被合成为吡咯烷(2)与γ-巴豆内酯(3)共轭加成反应的催化剂。在手性脲的催化下,这种异迈克尔反应大大加快。在催化剂 10e、10f 和 10g 的作用下,观察到了不对称诱导现象。