Synthesis of 2,3-Dihydropyrrolizines from Weinreb 3-(Pyrrolidin-2-ylidene)propionamides or Weinreb<i>N-</i>Vinylprolinamides
作者:Alfonso González-Ortega、Luis Calvo、M. Carmen Sañudo
DOI:10.1055/s-2002-35220
日期:——
Weinreb 3-(pyrrolidin-2-ylidene)propionamides and Weinreb N-vinylprolinamides were used for the synthesis of 2,3-dihydropyrrolizines. The selective reaction of the carboxamide group with organometallic compounds allowed us to obtain a great variety of carbonyl intermediates, analogous to the Hantzsch and Knorr pyrrole synthesis, which were thermally cyclized.
Reaction of enamines with trifluoromethyl containing carbonyl reagents
作者:Dmitriy A. Sibgatulin、Tatyana E. Shubina、Aleksandr N. Kostyuk、Dmitriy M. Volochnyuk、Reinhard Schmutzler、Peter G. Jones、Aleksandr M. Pinchuk
DOI:10.1016/j.jfluchem.2009.10.014
日期:2010.2
The reaction of linear push–pull enamines bearing a methyl group at the α-position with a set of trifluoromethylated carbonyl compounds was investigated. It has been found that the reaction proceeds at the methyl group of the enamines. The first computational study of the reaction between push–pull enamines and strong electrophilic reagents was reported. Out of three pathways considered DFT and MP2
Reaction of unsymmetrical trifluoromethyl-containing 1,3-dicarbonyl compounds with ‘push–pull’ enamines
作者:Dmitriy A. Sibgatulin、Dmitriy M. Volochnyuk、Alexander N. Kostyuk
DOI:10.1016/j.tetlet.2007.02.044
日期:2007.4
The reaction of ‘push–pull’ enamines with trifluoromethyl-containing 1,3-dicarbonyl compounds was investigated. It was found that the reaction is sensitive both to the structure of the enamines and to reaction conditions. As a result, a set of various trifluoromethyldialkylanilines was obtained.
Synthesis of 4-Dialkylamino-6-Trifluoromethyl-5,6-dihydro-2-pyridinones via Cyclization of Enamines with α-Chloro-β,β,β-trifluoroethylisocyanates
作者:Aleksandr N. Kostyuk、Dmitriy M. Volochnyuk、Andrei V. Bol’but、Dmitriy A. Sibgatulin、Andrei S. Kuklya、Mikhail V. Vovk
DOI:10.1055/s-2004-831165
日期:——
The interaction of α-chloro-β,β,β-trifluoroethylisocyanates with ‘push-pull’ enamines having a methyl group at the α-position was investigated. As a result, a set of 4-dialkylamino-6-trifluoromethyl-5,6-dihydro-2-pyridinones was obtained. Structural sensitivity of the reaction was found and discussed.
KIO<sub>3</sub>-Mediated γ-C(sp<sup>3</sup>)–H Sulfenylation of Enaminones
作者:Yu Zheng、Zhi-Wei Liu、Tao Li、Xian Li、Sheng-Hong Li
DOI:10.1021/acs.orglett.2c02824
日期:2022.10.21
A metal-free regioselective γ-C(sp3)–H sulfenylation of enaminones with heterocyclic thiols is reported. This transformation is efficient, mild, scalable, and environmentally friendly and tolerates a large variety of enaminones substrates and heterocyclic thiols. The utility of this strategy is demonstrated in a late-stage modification of bioactive natural products and drug derivatives.