Danagulyan GG, Panosyan HA, Gharibyan VK, Hasratyan AH. A Simple and Easily Implemented Method for the Regioselective Introduction of Deuterium into Azolo[1,5-
a]pyrimidines Molecules.
Molecules 2023;
28:molecules28062869. [PMID:
36985841 PMCID:
PMC10054722 DOI:
10.3390/molecules28062869]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/16/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
A method for the technically easy-to-implement synthesis of deuterium-labeled pyrazolo[1,5-a]pyrimidines and 1,2,4-triazolo[1,5-a]pyrimidines have been developed. The regioselectivity of such transformations has been shown. 1H NMR and mass spectrometric methods have proved the quantitative nature of such transformations and the kinetics of deuterium exchange has been studied. Spectrally, at different temperatures (+30 °C, -10 °C and -15 °C), the kinetics of the process was studied both in CD3OD and in deuterated alkali.
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