THE ACTION OF BASES ON ALPHA,BETA-DIBROMO KETONES AND RELATED SUBSTANCES
作者:E. P. Kohler、C. R. Addinall
DOI:10.1021/ja01372a048
日期:1930.9
Visible Light Photoredox Catalyzed Cascade Cyclizations of α-Bromochalcones or α-Bromocinnamates with Heteroarenes
作者:Suva Paria、Oliver Reiser
DOI:10.1002/adsc.201301069
日期:2014.2.10
AbstractVinyl radicals were generated from α‐bromochalcones or α‐bromocinnamate ethyl ester under visible light photoredox catalyzed conditions via an oxidative quenching cycle of the iridium complex [IrdF(CF3)ppy}2(dtbbpy)]PF6 and subjected to cascade cyclizations with heteroarenes entailing two consecutive CC bond formations and three CH activations. The process is amenable to furans, benzofurans, pyrroles, and indoles, giving rise to a broad variety of novel polycyclic frameworks in high yields under mild and environmentally benign reaction conditions.magnified image
Synthesis of aromatic derivatives of 1,5-benzodiazepine in the reaction of 4-nitro-o-phenylenediamine with chalcone dibromides
作者:N. N. Kolos、V. D. Orlov、E. Ya. Yuzefovskaya、F. G. Yaremenko、N. P. Vorob'eva、O. V. Shishkin、Yu. T. Struchkov、S. M. Ivkov
DOI:10.1007/bf01170744
日期:1995.7
Stereoselective cyclopropanation of α-bromochalcone with diethyl malonate promoted by K2CO3
A new Michael-initiated cyclopropanation reaction using alpha-bromochalcones as Michael acceptor was developed. Compared to previous works using arylidenemalonates as Michael acceptor, this novel protocol could improve the synthesis of trans-isomers of diethyl 2-benzoyl-3-phenyl-cyclopropane-1,1-dicarboxylates. More importantly, this method also provided the first access to the cis-isomers of these densely substituted cyclopropanes with the Michael-initiated ring closure (MIRC) strategy, albeit with a poor diastereoselectivity. (C) 2013 Published by Elsevier Ltd.
Visible light-mediated metal-free double bond deuteration of substituted phenylalkenes
作者:Roman Iakovenko、Jan Hlaváč
DOI:10.1039/d0gc03081c
日期:——
Photoactivated metal free deuteration of a double bond was developed in an environmentally friendly manner.