Bismuth Nitrate-Catalyzed Versatile Michael Reactions
作者:Neeta Srivastava、Bimal K. Banik
DOI:10.1021/jo026550s
日期:2003.3.1
Bismuth nitrate-catalyzed versatile Michael reaction was developed to reduce the complications that characterize the current standard Michael reaction and used for facile preparation of organiccompounds of widely different structures. For example, several substituted amines, imidazoles, thio compounds, indoles, and carbamates were prepared at room temperature by following this method. In contrast
ZrCl4 catalyzed highly selective and efficient Michael addition of heterocyclic enamines with α,β-unsaturated olefins
作者:Vijay Kumar、Sukhdeep Kaur、Subodh Kumar
DOI:10.1016/j.tetlet.2006.07.116
日期:2006.9
Highly selective and efficientMichaeladditions of heterocyclic enamines, viz. indoles, pyrroles, and pyrazoles with α,β-unsaturated olefins using 2 mol % of ZrCl4 has been achieved.
Reactions on solid supports part IV: Reactions of αβ-unsaturated carbonyl compounds with indoles using clay as catalyst
作者:Zafar Iqbal、Anthony H Jackson、K.R.Nagaraja Rao
DOI:10.1016/s0040-4039(00)86116-x
日期:1988.1
Indoles react with αβ-unsaturated carbonylcompounds in the presence of clay catalysts to give substituted indoles in good yields; in one case a 3-benzyl substituent already present migrated to the 2-position, being displaced by the incoming electrophile, thus confirming that electrophilic substitution in indole occurs primarily at the 3-position.
The Michael Addition of Indoles to α,β-Unsaturated Ketones Catalyzed by CeCl<sub>3</sub>·7H<sub>2</sub>O−NaI Combination Supported on Silica Gel<sup>1</sup>
Alkylation of indoles by means of the Michaeladdition has been the subject of a number of investigation. It is well established that regioselectivity in the additions of indoles to electron-deficient alkenes is strongly controlled by the reaction medium. In a continuation of the work on developing greener and cleaner technologies, the cerium(III) chloride heptahydrate and sodium iodide combination
Iodine-catalyzed highly efficient Michael reaction of indoles under solvent-free condition
作者:Bimal K. Banik、Miguel Fernandez、Clarissa Alvarez
DOI:10.1016/j.tetlet.2005.02.044
日期:2005.4
Michael reaction of indoles with unsaturated ketones has been accomplished in the presence of catalytic amount of iodine under solvent-free condition. (c) 2005 Published by Elsevier Ltd.