Rh(I)-catalyzed conjugate addition of alkenylzirconocene chloride: stereoselective formation of carbocycles through cascade reaction
作者:Yuji Hanzawa、Yoshitaka Takebe、Akio Saito、Akito Kakuuchi、Haruhiko Fukaya
DOI:10.1016/j.tetlet.2007.07.056
日期:2007.9
Stereoselective formation of carbocycles was carried out through [RhCl(cod)]2-catalyzed reactions of alkenylzirconocene chloride to ω-carbonyl-α,β-ene carbonyls (ketone, ester, and amide) or to bis-enone derivatives. The Rh(I)-catalyzed reaction of alkenylzirconocene chloride with ω-carbonyl-α,β-enoyl amide, which is derived from Oppolzer’s sultam, showed high diastereoselectivity to yield an carbocycle (95%
通过[RhCl(cod)] 2催化的烯基锆茂氯化物与ω-羰基-α,β-烯羰基(酮,酯和酰胺)或双烯酮衍生物的立体选择形成碳环。Oppolzer's sultam衍生的链烯基锆茂金属氯化物与ω-羰基-α,β-烯丙基酰胺的Rh(I)催化反应显示出高非对映选择性,可产生碳环(95%收率,> 95%de)。