The α-vinylation of β-dicarbonyl compounds by alk-1-enyl-lead triacetates
作者:Mark G. Moloney、John T. Pinhey
DOI:10.1039/p19880002847
日期:——
vinyl-lead compound (2), generated in this way, reacted rapidly with β-keto ester (5) to give the α-(E)-styryl derivative (6) in synthetically useful yield. This procedure for the α-vinylation of (5) has been applied to the divinytmercury compounds (7)–(13), and to the synthesis of the α-(E)-styryl β-dicarbonylcompounds (28), (30), (32), and (34). Compounds (6), (28), (30), (32), and (34). Compounds (6)
Iodine(III)-Mediated Oxidative Hydrolysis of Haloalkenes: Access to α-Halo Ketones by a Release-and-Catch Mechanism
作者:Antoine Jobin-Des Lauriers、Claude Y. Legault
DOI:10.1021/acs.orglett.5b03345
日期:2016.1.4
An unprecedented iodine(III)-mediated oxidative transposition of vinyl halides has been accomplished. The products obtained, α-halo ketones, are useful and polyvalent synthetic precursors. There are only a handful of reported examples of the direct conversion of vinyl halides to their corresponding α-halo carbonyl compounds. Insights into the mechanism and demonstration that this synthetic transformation
Debrominations of <i>vic</i>-Dibromides with Diorganotellurides. 1. Stereoselectivity, Relative Rates, and Mechanistic Implications
作者:Timothy S. Butcher、Feng Zhou、Michael R. Detty
DOI:10.1021/jo9713363
日期:1998.1.1
Debrominations of vic-dibromides with diaryl tellurides 1-4 and di-n-hexyl telluride (9) are described. A mechanistic explanation of the debromination is offered which accounts for several key experimental observations: (1) the reaction is highly stereoselective with erythro-dibromides giving trans-olefins and threo-dibromides giving cis-olefins, (2) the reaction is accelerated by more electron-rich