Keglevich G, Harsági N, Drahos L, Zsuzsa Kiss N. Synthesis of Phosphonates with Identical and Different Alkyl Groups by the Microwave-Assisted Alkylation of Phosphonic Ester-Acid Derivatives.
Chempluschem 2023;
88:e202200342. [PMID:
36420946 DOI:
10.1002/cplu.202200342]
[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: 10/05/2022] [Revised: 10/28/2022] [Indexed: 11/25/2022]
Abstract
Monoalkyl phosphonic derivatives obtained by the microwave (MW)- and ionic liquid-promoted direct esterification of alkylphosphonic acids were converted to the corresponding dialkyl alkylphosphonates on reaction with alkyl halides in the presence of triethylamine, under solvent-free MW-assisted conditions. Derivatives with different alkoxy groups were also synthesized. A minor "disproportionation" side reaction was identified during the preparation of dialkyl alkylphosphonates with different alkoxy groups. All together 12 alkylphosphonates were prepared by the efficient method developed.
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