Al-Najjar HJ, Barakat A, Al-Majid AM, Mabkhot YN, Weber M, Ghabbour HA, Fun HK. A greener, efficient approach to Michael addition of barbituric acid to nitroalkene in aqueous diethylamine medium.
Molecules 2014;
19:1150-62. [PMID:
24445342 PMCID:
PMC6271361 DOI:
10.3390/molecules19011150]
[Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 01/07/2014] [Accepted: 01/10/2014] [Indexed: 11/22/2022] Open
Abstract
An efficient method for the synthesis of a variety of pyrimidine derivatives 3a–t by reaction of barbituric acids 1a,b as Michael donor with nitroalkenes 2a–k as Michael acceptor using an aqueous medium and diethylamine is described. This 1,4-addition strategy offers several advantages, such as using an economic and environmentally benign reaction media, high yields, versatility, and shorter reaction times. The synthesized compounds were identified by 1H-NMR, 13C-NMR, CHN, IR, and MS. The structure of compound 3a was further confirmed by single crystal X-ray structure determination.
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