Jiang B, Cao LJ, Tu SJ, Zheng WR, Yu HZ. Highly diastereoselective domino synthesis of 6-spirosubstituted pyrido[2,3-d]pyrimidine derivatives in water.
ACTA ACUST UNITED AC 2010;
11:612-6. [PMID:
19537742 DOI:
10.1021/cc900038g]
[Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A highly diastereoselective domino reaction of 2,6-diaminopyrimidine-4-one with structurally diverse aryl aldehydes and various barbituric acids in water under microwave irradiation is described. The products are 6-spiro-substituted pyrido[2,3-d]pyrimidines with high diastereoselectivities (up to 99: 1) in which the major diastereomer bears a cis relationship between substituents at the 5- and 7-positions. Furthermore, the mechanism for diastereoselectivity was confirmed by DFT (B3LYP) calculations.
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