Muravev AA, Solovieva SE, Galieva FB, Bazanova OB, Rizvanov IK, Ivshin KA, Kataeva ON, Matthews SE, Antipin IS. Calixarene alpha-ketoacetylenes: versatile platforms for reaction with hydrazine nucleophile.
RSC Adv 2018;
8:32765-32769. [PMID:
35547685 PMCID:
PMC9086332 DOI:
10.1039/c8ra06349d]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 09/15/2018] [Indexed: 11/22/2022] Open
Abstract
Late stage diversification of calix[4]arenes and thiacalix[4]arenes with heterocycles remains a significant synthetic challenge and hampers further exploitation of the scaffolds. Here we describe the development of a short and facile synthetic route to conformationally diverse novel calix[4]arene and thiacalix[4]arene ynones using a palladium cross coupling approach (5% Pd(ii) + 10% Cu(i)) with benzoyl chloride. Their successful conversion to heterocycles to afford pyrazoles was demonstrated through treatment with hydrazine. Functionalisation is calixarene conformation and linker independent enabling access to a library of structures.
Late stage diversification of calix[4]arenes and thiacalix[4]arenes with heterocycles remains a significant synthetic challenge and hampers further exploitation of the scaffolds.![]()
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