New method for the synthesis of chromeno[4,3-b]chromene derivatives via multicomponent reaction promoted by niobium pentachloride

dos Santos, Willian Henrique; da Silva-Filho, Luiz Carlos

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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

New method for the synthesis of chromeno[4,3-b]chromene derivatives via multicomponent reaction promoted by niobium pentachloride

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Author(s):	dos Santos, Willian Henrique ; da Silva-Filho, Luiz Carlos Total Authors: 2
Document type:	Journal article
Source:	Tetrahedron Letters; v. 58, n. 9, p. 894-897, MAR 1 2017.
Web of Science Citations:	4
Abstract
Chromeno{[}4,3-b]chromene derivatives were synthesized from multicomponent reaction between 4-hydroxycoumarin, aryl aldehyde derivatives and 1,3-cyclohexanedione promoted by niobium pentachloride. This new method is simple, cost-effective, provides good yields with good substrate generality and can be conducted in short reaction times. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process:	16/01599-1 - Studies about the use of NbCl5 in multicomponent reactions for the synthesis of organic dyes
Grantee:	Luiz Carlos da Silva Filho
Support Opportunities:	Regular Research Grants

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