Rhodium-catalyzed 1,4-addition of alkenylzirconocene chlorides to electron deficient alkenes
作者:Akito Kakuuchi、Takeo Taguchi、Yuji Hanzawa
DOI:10.1016/j.tet.2003.08.073
日期:2004.2
acid esters, and α,β-enoic acid amides can be efficiently achieved by the use of [RhCl(cod)]2 catalyst. A high diastereoselectivity (95% yield, 90% de) was obtained through the reaction of α,β-enoic acid amide derived from Oppolzer'ssultam and 2-butenoyl chloride, while the use of Evans' chiral oxazolidinone as a chiral auxiliary in place of Oppolzer'ssultam gave a poor diastereoselectivity (98% yield
Nickel-catalyzed conjugate addition of zirconium alkenyls to .alpha.,.beta.-unsaturated ketones
作者:Melanie J. Loots、Jeffrey Schwartz
DOI:10.1021/ja00466a044
日期:1977.11
Nickel-catalyzed conjugate addition of alkenylzirconium species to .alpha.,.beta.-unsaturated ketones
作者:Jeffrey Schwartz、Melanie J. Loots、Hiroshi Kosugi
DOI:10.1021/ja00524a017
日期:1980.2
Synthesis of<i>trans</i>-Disubstituted Alkenes by Cobalt-Catalyzed Reductive Coupling of Terminal Alkynes with Activated Alkenes
作者:Subramaniyan Mannathan、Chien-Hong Cheng
DOI:10.1002/chem.201200779
日期:2012.9.10
CoCl2/P(OPh)3/Zn system providing a mixture of 1,2‐trans‐ and 1,1‐disubstituted functionalized terminal alkene products in high yields. The scope of the reaction was also extended by the coupling of 1,3‐enynes and acetylene gas with alkenes. Furthermore, a phosphine‐free cobalt‐catalyzed reductive coupling of terminal alkynes with enones, affording 1,2‐trans‐disubstituted alkenes as the major products in a high regioisomeric