Selektive Synthesen mit Organometallen I. Konfigurativ einheitliche Folgeprodukte aus Alkenylkalium-Zwischenstufen
作者:Manfred Schlosser、J�rgen Hartmann、Victor David
DOI:10.1002/hlca.19740570611
日期:——
Methyl groups in positions adjacent to an olefinic double bond can be metalated without cis/trans isomerisation. On the other hand configurational changes can be brought about via metalotropy; under equilibrium conditions the Z isomers (metal cis to an alkyl in β position) predominate overwhelmingly. This behaviour opens new stereoselective routes of high preparative utility.
Copper(II) Triflate, a New Reagent for Mild Dehydration of Alcohols: Synthetic Usefulness and Mechanistic Insight
作者:Khosrow Laali、Robert J. Gerzina、Christine M. Flajnik、Cynthia M. Geric、Ann Marie Dombroski
DOI:10.1002/hlca.19870700314
日期:1987.5.6
The effectiveness of copper(II) triflate (copper(II) trifluoromethanesulfonate) as a new dehydratingreagent for a variety of alcohols has been demonstrated. Based on several control experiments, a possible mechanism is suggested.