Batra A, Kaur M, Kaushik D, Kaur S, Patil MT, Chaudhari VD, Sahoo SC, Salunke DB. Synthesis of Triazolo[4',5':4,5]furo[2,3-
c]pyridine via Post Modification of an Unusual Groebke-Blackburn-Bienaymé Multicomponent Reaction.
ACS OMEGA 2024;
9:29372-29378. [PMID:
39005789 PMCID:
PMC11238224 DOI:
10.1021/acsomega.4c01359]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 05/06/2024] [Accepted: 05/22/2024] [Indexed: 07/16/2024]
Abstract
The Groebke-Blackburn-Bienaymé (GBB) reaction is a well-established three-component reaction for synthesizing imidazofused scaffolds from heterocyclic amidines, aldehydes, and isonitriles. However, the replacement of pyridoxal as an aldehyde component in this reaction results in the formation of the furo[2,3-c]pyridine skeleton as an "unusual GBB product". Despite the interesting nature of this unusual reaction, not much work was further reported. The present research investigates the optimization strategy for the synthesis of novel tricyclic triazolo[4',5':4,5]furo[2,3-c]pyridines via diazotization of 2,3-diamino-furo[2,3-c]pyridines specifically synthesized utilizing the chemistry of tert-alkyl isocyanide.
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