BF 3 ·CH 3 NO 2介导的多烯级联环化反应。通过非功能化3°烯烃的阳离子引发直接立体定向合成多环中间体的非常规高效方法。在(±)-紫杉二酮的全合成中的应用。
摘要:
BF 3气体在硝基甲烷中的便捷储备溶液已显示出可促进“ H +催化”多烯环化反应,并以极佳的区域和立体控制水平进行。甲直接这种新方法的用于实现阳离子polyannulations若干现代以及经典程序相比,已经结论性地确定的BF的制备优点3 ·CH 3 NO 2平台。描述了这些新条件用于阳离子多环化的简明全合成抗肿瘤药(±)-紫杉二酮。
Terminator regulated mechanistic divergence in BF<sub>3</sub>·MeNO<sub>2</sub>promoted cascade annulations of geometrically defined trienoate derivatives
作者:Scott R. Harring、Tom Livinghouse
DOI:10.1039/c39920000503
日期:——
The outcome of BF3·MeNO2 promoted cascade cyclizations involving several di- and tri-enoates is shown to be strongly coupled to the nature of the terminating moiety.
Formation of episulfonium ions from alkenes. Application to the synthesis of higher order carbocycles via episulfonium ion initiated polyene cyclizations
作者:Eric D. Edstrom、Tom Livinghouse
DOI:10.1021/jo00381a049
日期:1987.3
EDSTROM E. D.; LIVINGHOUSE T., J. ORG. CHEM., 52,(1987) N 5, 949-951