Janecký L, Beier P. Lewis acid-mediated transformations of 5-acyl-
N-fluoroalkyl-1,2,3-triazoles to cyclopentenones, indenones, or oxazoles.
RSC Adv 2024;
14:13640-13645. [PMID:
38665503 PMCID:
PMC11043917 DOI:
10.1039/d4ra01707b]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 04/19/2024] [Indexed: 04/28/2024] Open
Abstract
We present a transition metal-free approach to 2-N-substituted indenones, cyclopentenones, and 4-carbonyl oxazoles, based on the reaction of 5-acylated N-fluoroalkyl substituted 1,2,3-triazoles (prepared by a three-component click reaction of copper acetylides, fluoroalkyl azides, and acyl chlorides) with Lewis acids aluminium trichloride or boron trifluoride etherate, proceeding via the generation and cyclization of vinyl cations.
Collapse