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Organophotoredox Catalysis: Visible-light-induced Multicomponent Synthesis of Chromeno[4, 3-b]chromene and Hexahydro-1H-xanthene Derivatives

[ Vol. 6 , Issue. 3 ]

Author(s):

Amit K. Sharma, Jyoti Tiwari, Deepali Jaiswal, Shailesh Singh, Jaya Singh and Jagdamba Singh*   Pages 222 - 230 ( 9 )

Abstract:


Background: In recent years, photoredox catalysis using eosin Y has gained considerable significance in organic chemistry. It is evolving as a powerful approach in modern organic synthesis for the activation of small molecules.

Objective: The use of organic dyes to convert visible light into chemical energy by involving a single-electron transfer with organic substrates has innumerable applications.

Method and Results: The present strategy is the first example of visible light promoted, aerobic, oxidative cyclization of chromeno[4,3-b]chromenes and hexahydro-1H-xanthenes via the formation of C–O and C–C bonds to afford excellent yield of the products in a simple one-pot operation under mild reaction conditions.

Conclusion: The major advantages of the present methodology include short reaction time, cost effectiveness, easy work-up, broad substrate scope and high atom economy.

Keywords:

Chromeno[4, 3-b]chromenes, hexahydro-1H-xanthene, multicomponent, photoredox catalysis, visible light, synthesis.

Affiliation:

Environmentally Benign Synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad-211002, Environmentally Benign Synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad-211002, Environmentally Benign Synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad-211002, Environmentally Benign Synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad-211002, Department of Chemistry, LRPG College, Sahibabad, Ghaziabad-201005, Environmentally Benign Synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad-211002

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