Pyridinium ylide-assisted KY zeolite catalyzed tandem synthesis of polysubstituted cyclopropanes

Rama, Velladurai; Kanagaraj, Kuppusamy; Subramanian, Thirumeni; Suresh, Palaniswamy; Pitchumani, Kasi

doi:10.1016/j.catcom.2012.04.020

Cited by 21 publications

(4 citation statements)

References 44 publications

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“…The reaction utilizes substituted benzyl halides, aromatic aldehydes, pyridine, acetonitrile derivatives, and potassium-exchanged Y zeolites as basic catalyst (Scheme 24). The same reaction performed in absence of the zeolite gave no product, since the pyridine basicity was insufficient for catalyzing the final addition that provides the cyclopropane, while it could only promote the Knoevenagel condensation [47]. Scheme 23.…”

Section: Synthesis Of Polysubstituted Cyclopropanes Catalyzed By Basimentioning

confidence: 99%

Zeolites as Acid/Basic Solid Catalysts: Recent Synthetic Developments

2019

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The zeolites are porous solid structures characterized by a particular framework of aluminosilicates, in which the incorporation of the Al+3 ions generates an excess of negative charge compensated by cations (usually alkali or alkali earth) or protons. In the latter case, they are employed as catalysts for a wide variety of reactions, such as dehydration, skeletal isomerization and cracking, while the catalytic activity of basic zeolites has not found, up to now, any industrial or whatever relevant application in chemical processes. In the present review, we firstly intend to give an overview of the fundamental chemical composition, as well as the structural features of the zeolite framework. The purpose of this paper is to analyze their key properties as acid, both Lewis and Brønsted, and basic solid support. Their application as catalysts is discussed by reviewing the already published works in that field, and a final remark of their still unexplored potential as green, mild, and selective catalyst is also reported.

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Section: Synthesis Of Polysubstituted Cyclopropanes Catalyzed By Basimentioning

confidence: 99%

Zeolites as Acid/Basic Solid Catalysts: Recent Synthetic Developments

2019

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“…A step towards green chemistry in this context was achieved by the application of a zeolite based catalyst. 36 In the present paper we employ aqueous media in the synthesis of substituted cyclopropanes with a short reaction time and easy workup without using any purification technique. To the best of our knowledge, this is the first report on the synthesis of heterocyclic scaffolds directly attached to a cyclopropane ring system in water (Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

Cyclopropanes in water: a diastereoselective synthesis of substituted 2H-chromen-2-one and quinolin-2(1H)-one linked cyclopropanes

et al. 2016

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“…to be highly effective for the synthesis of 2-aroyl-3-aryl-1cyanocyclopropane-1-carboxylates. [19][20][21] Along this line, various 1,2,3-trisubstituted cyclopropane derivatives have been reported to exhibit important biological activities. All these facts have inspired us to study the decarboxylation reactions of 2-aroyl-3-aryl-1-cyanocyclopropane-1-carboxylates, which have not been studied before, for the formation of 1,2,3-trisubstituted cyclopropane with a cyano group as a precursor of the aminomethylcyclopropane skeleton.…”

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confidence: 98%