TMG catalyzed cyclopropanation of cyclopentenone. Illustration by a simple synthesis of bicyclo[3.1.0]hexane-2-one derivatives
作者:Fuyao Zhang、Eric D. Moher、Tony Y. Zhang
DOI:10.1016/j.tetlet.2007.03.006
日期:2007.4
The catalytic preparation of bicyclo[3.1.0]hexane-2-one-6-carboxylic acid ethyl ester 1 is described by cyclopropanation of cyclopentenone using 1,1,3,3-tetramethylguanidine (TMG) as a catalyst in high yield and high diastereoselectivity. This process has been applied to an efficient synthesis of the important intermediate, β-hydroxyl cyclopentanone 2.
以1,5,3,3-四甲基胍(TMG)为催化剂,通过环戊烯酮的环丙烷化反应,描述了双环[3.1.0]己烷-2-一-6-羧酸乙酯1的催化制备。非对映选择性。该方法已用于重要中间体β-羟基环戊酮2的有效合成。