Chemoselective Homologation–Deoxygenation Strategy Enabling the Direct Conversion of Carbonyls into (<i>n+1</i>)-Halomethyl-Alkanes
作者:Margherita Miele、Andrea Citarella、Thierry Langer、Ernst Urban、Martin Zehl、Wolfgang Holzer、Laura Ielo、Vittorio Pace
DOI:10.1021/acs.orglett.0c02831
日期:2020.10.2
The sequential installation of a carbenoid and a hydride into a carbonyl, furnishing halomethyl alkyl derivatives, is reported. Despite the employment of carbenoids as nucleophiles in reactions with carbon-centered electrophiles, sp3-type alkyl halides remain elusive materials for selective one-carbon homologations. Our tactic levers on using carbonyls as starting materials and enables uniformly high
Ethyl-2-(2-chloroethyl)acrylate: a new very versatile α-cyclopropylester cation synthon. Efficient synthesis of cyclopropane ester derivatives by Michael addition-induced cyclization reaction
作者:Mathilde Lachia、Sébastien Iriart、Myriam Baalouch、Alain De Mesmaeker、Renaud Beaudegnies
DOI:10.1016/j.tetlet.2011.04.046
日期:2011.6
We report here the use of the readily accessible ethyl-2-(2-chloroethyl)acrylate as a new very versatile alpha-cyclopropylester cation synthon, which reacts efficiently and selectively with carbon-, nitrogen-, sulfur- or phosphorus-centered nucleophiles through Michael addition followed by intramolecular capture of the incipient ester enolate to afford funtionalized cyclopropane esters in high yields. (C) 2011 Elsevier Ltd. All rights reserved.
Nucleophilic reactivity of zinc and copper carbenoids. Part II
作者:Paul Knochel、Tso Sheng Chou、Huai Gu Chen、Ming Chang P. Yeh、Michael J. Rozema
DOI:10.1021/jo00283a006
日期:1989.10
Design and synthesis of novel spirocyclopropyl cyclohexane-1,3-diones and -1,3,5-triones for their incorporation into potent HPPD inhibitors
作者:Renaud Beaudegnies、Alain De Mesmaeker、Aurélie Mallinger、Myriam Baalouch、André Goetz
DOI:10.1016/j.tetlet.2010.03.047
日期:2010.5
We report the design and the efficient synthesis of novel spirocyclopropyl cyclohexane-1,3-dione and -1,3,5-trione units to be incorporated into potent HPPD inhibitors. New routes involving original combinations of synthetic equivalents of alpha-cyclopropyl ketone-alpha-anion and alpha-cyclopropyl ester-beta-cation are described. (C) 2010 Elsevier Ltd. All rights reserved.