Synthesis 2023; 55(01): 121-130
DOI: 10.1055/a-1941-1242
paper

An Efficient One-Pot Synthesis of 1-Aminophosphonates

a   Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Gava Zang, 45137-66731 Zanjan, Iran
,
Samaneh Faghih
a   Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Gava Zang, 45137-66731 Zanjan, Iran
b   Department of Chemistry, Iran University of Science and Technology, 16846-13114 Tehran, Iran
,
Sajedeh Alavi
a   Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Gava Zang, 45137-66731 Zanjan, Iran
,
b   Department of Chemistry, Iran University of Science and Technology, 16846-13114 Tehran, Iran
,
Alireza Fattahi
c   Faculty of Chemistry, Sharif University of Technology, P. O. Box 11365-9516, Tehran, Iran
› Author Affiliations
The Iran National Science Foundation (98024981) and Institute for Advanced Studies in Basic Sciences are thanked for supporting this work.


Abstract

1-Aminophosphonates are valuable compounds with wide range of applications in biological and industry. Various reaction conditions and catalysts have been reported for the synthesis of 1-aminophosphonates via three-component (dialkyl phosphite + aldehyde + amine) or two-component reaction (dialkyl phosphite + imine). Here a solvent-free synthesis of 1-aminophosphonates under very mild reaction conditions is reported. The three-component condensation reactions of dialkyl phosphite, carbonyl compound, and an amine gave 1-aminophosphonates in good to excellent yields under solvent- and catalyst-free conditions at ambient temperature. Hydrophosphorylation of imines in the presence of dialkyl phosphite under the same conditions gave also 1-aminophosphonates in good to excellent yields. These results showed that the reaction needs no catalyst or solvent for activation. It seems a tautomeric form of dialkyl phosphite (as one of the components) catalyzed the reaction. The reaction yield decreased using any solvent. In addition, a novel method is reported for the synthesis of N-deprotected 1-aminophosphonates (analogues of 1-amino acids) from N-PMP 1-aminophosphonate in the presence of TCCA. To understand the activity of the dialkyl phosphite under solvent-free conditions, the DFT calculations have provided insight into the basis of this activity.

Supporting Information



Publication History

Received: 17 August 2022

Accepted after revision: 12 September 2022

Accepted Manuscript online:
12 September 2022

Article published online:
10 October 2022

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