Novel type of carbozirconation reaction of alkynes
作者:Noriyuki Suzuki、Denis Y. Kondakov、Motohiro Kageyama、Martin Kotora、Ryuichiro Hara、Tamotsu Takahashi
DOI:10.1016/0040-4020(94)01138-p
日期:1995.4
Noveltype of carbozirconation reaction of alkynes is reported. Treatment of zirconocenealkyne complexes, zirconacyclopentenes, or zirconacyclopentadienes with allylic compounds gave allylzirconation products of alkynes. Carbozirconation of alkynes with zirconacyclopentenes or zirconacyclopentadienes involved β,β′-C-C bond cleavage reaction of zirconacycles. Reactions of zirconacyclopentenes with homoallyl
Zn/[bmim]PF6-mediated Markovnikov allylation of unactivated terminal alkynes
作者:J.S. Yadav、B.V.S. Reddy、P. Murali Krishna Reddy、Manoj K. Gupta
DOI:10.1016/j.tetlet.2005.09.147
日期:2005.11
A simple and highly regioselective method has been developed for the allylation of unactivated terminal alkynes with allylbromide using Zn/[bmim]PF6 as an inexpensive, readily available and recyclable reagent system. High conversions and enhanced selectivity together with the environmentally benign nature of the Zn/[bmim]PF6 reagent system makes this method an attractive alternative to established
Indium-mediated regioselective Markovnikov allylation of unactivated terminal alkynes
作者:Brindaban C. Ranu、Adinath Majee
DOI:10.1039/a702241g
日期:——
Allylation of unactivated terminal alkynes by a simple treatment with
allyl bromide and indium metal in THF at room temperature produces
1,4-dienes via regioselective Marknovnikov addition.
作者:Phil Ho Lee、Yunkiu Heo、Dong Seomoon、Sundae Kim、Kooyeon Lee
DOI:10.1039/b417975g
日期:——
The reactions of terminal alkynes with allylgallium reagents generated in situ from gallium and allyl bromides gave the corresponding 1,4-dienes in good yield via Markovnikov addition in THF at 70 °C.
The trans-allylstannylation of simple acetylenes 1 is catalysed by ZrCl4 to produce the corresponding alkenylstannanes 3 (or alkenes 4 upon protonolysis of the C–Sn bond) in a regio- and stereo-selective manner.