Metal promoted cyclization. 18. Novel cyclialkylation reactions of (.omega.-halo-1-alkenyl)metal derivatives. Synthetic scope and mechanism
作者:Eiichi. Negishi、Larry D. Boardman、Hiroyuki. Sawada、Vahid. Bagheri、A. Timothy. Stoll、James M. Tour、Cynthia L. Rand
DOI:10.1021/ja00224a025
日期:1988.8
Cyclisation d'(ω-halogenoalcene-1yl) M et d'([ω-halogeno trimethylsilyl-1] alcene-1yl) M en cyclenes (M=aluminium, zinc, zirconium, ou silicium)
环化 d'(ω-halogenoalcene-1yl) M et d'([ω-halogeno trimethylsilyl-1] alcene-1yl) M 环烯(M = 铝、锌、锆、硅)
NEGISHI, EI-ICHI;BOARDMAN, LARRY D.;SAWADA, HIROYUKI;BAGHERI, VAHID;STOLL+, J. AMER. CHEM. SOC., 110,(1988) N 16, C. 5383-5396
作者:NEGISHI, EI-ICHI、BOARDMAN, LARRY D.、SAWADA, HIROYUKI、BAGHERI, VAHID、STOLL+
DOI:——
日期:——
Gold-Catalyzed Cycloisomerization of Functionalized 1,5-Enynes - An Entry to Polycyclic Framework
作者:Patrick Toullec、Véronique Michelet、Alexandre Pradal、Qian Chen、Pierre Faudot dit Bel
DOI:10.1055/s-0031-1289867
日期:2012.1
The gold-catalyzed cycloisomerization reactions of variously functionalized 1,5-enynes are presented. The cyclization processes implying aryl- and 1,3-dicarbonyl-substituted skeletons are conducted under mild conditions and lead to cyclic structures obtained according to 6-endo-dig or 5-endo-dig mode depending on the involved nucleophilic partner. Some competitive pathways and trapping of carbocationic intermediates are highlighted.