derivatives containing three stereocenters were prepared via one-step synthesis in yields ranging from 88 to 96% and in enantioselectivities (enantiomeric excess (ee)) ranging from 85 to 97%, with diastereoselectivities of approximately 14/2/1. Therefore, this method provides an efficientroute for the synthesis of a new class of opticallyactive 2-spirobenzothiophenones.
本报告描述了在金鸡纳生物碱胺存在下2-亚烷基苯并[ b ]噻吩酮衍生物与烯酮之间的有机催化级联反应。通过一步合成,制备了包含三个立体中心的螺苯并噻吩苯甲酸环己烷衍生物,其产率为88%至96%,对映选择性(对映体过量(ee))为85至97%,非对映选择性约为14/2/1。因此,该方法为合成新型的光学活性的2-螺苯并噻吩酮提供了有效的途径。
Photochemical Reactions of Benzo[<i>b</i>]Thiophene-2,3-Diones with 2,3-Dimethylbut-2-Ene
作者:Jiro Tatsugi、Naoki Shimazaki
DOI:10.1080/10426500590912899
日期:2005.3.2
Abstract Photochemical reactions of benzo[b]thiophene-2,3-diones with 2,3-dimethylbut-2-ene gave dioxene derivatives in excellent yields.
Kropp Kevin G., Goncalves Jose A., Andersson Jan T., Fedorak Phillip M., Environ. Sci. and Technol., 28 (1994) N 7, S 1348-1356
作者:Kropp Kevin G., Goncalves Jose A., Andersson Jan T., Fedorak Phillip M.
DOI:——
日期:——
237. The comparative reactivity of the carbonyl groups in the thionaphthenquinones. Part II. The influence of substituent groups in the thionaphthenquinones