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Vol. 32 No. 7 (2020): Vol 32 Issue 7

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CuSCN Catalyzed Conjugate Addition of Grignard Reagents to Substituted Coumarins with Dilithium Tetrachloromanganate

Mohan B. Kale
Department of Chemistry, PDEA′s Annasaheb Magar Mahavidyalaya, Hadapsar, Pune-411028, India
https://orcid.org/0000-0002-1447-4704
Shrikant B. Jagtap
Department of Chemistry, PDEA′s Annasaheb Magar Mahavidyalaya, Hadapsar, Pune-411028, India
Santosh S. Devkate
Department of Chemistry, PDEA′s Annasaheb Magar Mahavidyalaya, Hadapsar, Pune-411028, India
https://orcid.org/0000-0001-7787-023X

Corresponding Author(s) : Shrikant B. Jagtap

drshrikantjagtap@yahoo.com

Asian Journal of Chemistry, Vol. 32 No. 7 (2020): Vol 32 Issue 7

Abstract

The regioselective 1,4-addition of CuSCN catalyzed Grignard reagents to the substituted coumarins are reported. The Li2MnCl4 reagent is used to transmetallate magnesium by manganese. It adds regioselectively to coumarins and forms 1,4-addition products with higher yield under the atmosphere of nitrogen gas and at a lower temperature.

Keywords

Coumarin Grignard reagent Dilithium tetrachloromanganate Conjugate addition Transmetalation
Kale, M. B., Jagtap, S. B., & Devkate, S. S. (2020). CuSCN Catalyzed Conjugate Addition of Grignard Reagents to Substituted Coumarins with Dilithium Tetrachloromanganate. Asian Journal of Chemistry, 32(7), 1793–1798. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/2401
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