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Molecules 2016, 21(2), 250; doi:10.3390/molecules21020250

Multicomponent Synthesis and Evaluation of New 1,2,3-Triazole Derivatives of Dihydropyrimidinones as Acidic Corrosion Inhibitors for Steel

1
Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo No. 180, Ciudad de México, C.P. 02200, Mexico
2
Departamento de Ingeniería Metalúrgica, Facultad de Química, Universidad Nacional Autónoma de México, C.U., Ciudad de México, C.P. 04510, Mexico
3
Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado Postal 14-740, 07000 Ciudad de México, Mexico
*
Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 23 December 2015 / Revised: 7 February 2016 / Accepted: 17 February 2016 / Published: 22 February 2016
(This article belongs to the Special Issue MCRs and Related One-Pot Organic Synthesis)
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Abstract

An efficient one-pot synthesis of 1,2,3-triazole derivatives of dihydropyrimidinones has been developed using two multicomponent reactions. The aldehyde-1,2,3-triazoles were obtained in good yields from in situ-generated organic azides and O-propargylbenzaldehyde. The target heterocycles were synthesized through the Biginelli reaction in which the aldehyde-1,2,3-triazoles reacted with ethyl acetoacetate and urea in the presence of Ce(OTf)3 as the catalyst. The corrosion inhibition of steel grade API 5 L X52 in 1 M HCl by the synthesized compounds was investigated using the electrochemical impedance spectroscopy technique. The measurements revealed that these heterocycles are promising candidates to inhibit acidic corrosion of steel. View Full-Text
Keywords: multicomponent synthesis; dihydropyrimidinone; 1,2,3-triazole; corrosion inhibitor; steel multicomponent synthesis; dihydropyrimidinone; 1,2,3-triazole; corrosion inhibitor; steel
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González-Olvera, R.; Román-Rodríguez, V.; Negrón-Silva, G.E.; Espinoza-Vázquez, A.; Rodríguez-Gómez, F.J.; Santillan, R. Multicomponent Synthesis and Evaluation of New 1,2,3-Triazole Derivatives of Dihydropyrimidinones as Acidic Corrosion Inhibitors for Steel. Molecules 2016, 21, 250.

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