Chemistry of organosilicon compounds. 99. Conjugate addition of allylsilanes to .alpha.,.beta.-enones. A New method of stereoselective introduction of the angular allyl group in fused cyclic .alpha.,.beta.-enones
Intramolecular cycloaddition reactions of exocyclic nitrones
作者:Raymond L. Funk、Gary L. Bolton、Joy Umstead Daggett、Marvin M. Hansen、Linus H.M. Horcher
DOI:10.1016/s0040-4020(01)96702-x
日期:1985.1
Exocyclic nitrones smoothly participate in intramolecular cycloaddition reactions to provide bridged and fused polycarbocycles. The exploitation of this methodology in the total syntheses of the sesquiterpenes (±)-7,12-secoishwaran-12-ol (44), (±)-hirsutene (56), (±)-coriolin (68) is also presented.
Efforts Toward a Synthesis of Crotogoudin and Crotobarin
作者:Duy Mai、Dmitriy Uchenik、Christopher Vanderwal
DOI:10.1055/s-0036-1588560
日期:2017.9
crotogoudin are discussed, and efforts to achieve each are described. First, a Cope rearrangement/intramolecular Diels–Alder cascade reaction was investigated. Second, a bioinspired sequence of cationic bicyclization and A-ring oxidative fragmentation set-up for a lactonization induced by a phenolic oxidation, ultimately providing a tricyclic intermediate that required only installation of the bridging ring
讨论了二萜类 crotogoudin 的两种合成设计,并描述了实现每一种的努力。首先,研究了Cope重排/分子内Diels-Alder级联反应。其次,由酚氧化诱导的内酯化的阳离子双环化和 A 环氧化断裂设置的生物启发序列,最终提供了一个三环中间体,只需要安装突出的双环 [2.2.2] 辛烷系统的桥环. 这最后的努力充满了困难,但确实导致了相关酮烯烃通过基于锰(III)的自由基化学环化的条件的发展。
Facile bridged bicycloalkane synthesis via intramolecular nitrone-olefin cycloaddition
作者:Raymond L. Funk、Linus H. M. Horcher、Joy Umstead Daggett、Marvin M. Hansen
DOI:10.1021/jo00163a052
日期:1983.7
Chemistry of organosilicon compounds. 99. Conjugate addition of allylsilanes to .alpha.,.beta.-enones. A New method of stereoselective introduction of the angular allyl group in fused cyclic .alpha.,.beta.-enones
作者:Akira Hosomi、Hideki Sakurai
DOI:10.1021/ja00447a080
日期:1977.3
CONJUGATE ALLYLATION OF a,b-UNSATURATED KETONES WITH ALLYLSILANES: 4-PHENYL-6-HEPTEN-2-ONE