Synlett 2024; 35(20): 2459-2464
DOI: 10.1055/a-2422-1263
letter
Special Issue to Celebrate the 75th Birthday of Prof. B. C. Ranu

Lewis Acid Catalyzed Domino Ring-Opening Cyclization of Azetidines with Alkynes: Synthesis of Tetrahydropyridines

Dipti Shukla
,
Shishir Singh
,
Amit Kumar Sharma
,
,
,
,
M.K.G. is grateful to the Science and Engineering Research Board (SERB), New Delhi and the Indian Institute of Technology (IIT) Kanpur, India for financial support. D.S., A.B., and R.T. thank the IIT Kanpur. B.S. thanks the Council of Scientific and Industrial Research (CSIR), India; S.S. and A.K.S. thank the University Grants Commission (UGC), India for research fellowships.


Dedicated to Prof. B. C. Ranu on the occasion of his 75th birthday

Abstract

A simple strategy for the synthesis of a variety of tetrahydropyridines in good to excellent yields via a Cu(OTf)2 catalyzed quaternary ammonium salt mediated ring-opening of activated azetidines followed by cyclization with alkynes in a domino ring-opening cyclization (DROC) is described. The formation of the products has been explained by an SN2-type ring-opening of azetidines with alkynes.

Supporting Information



Publication History

Received: 02 August 2024

Accepted after revision: 25 September 2024

Accepted Manuscript online:
25 September 2024

Article published online:
25 October 2024

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