Photochemical ring contraction of 4??heteroaryl??substituted 1, 4 (or 3, 4)??dihydropyrimidines into imidazoles

RE Van der Stoel, HC van der Plas…

文献索引：Stoel, R. E. van der; Plas, H. C. van der; Jongejan, H. Recueil: Journal of the Royal Netherlands Chemical Society, 1983 , vol. 102, # 7-8 p. 364 - 367

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被引用次数: 5

摘要

Abstract Photolysis of 4-R-1, 4 (or 3, 4)-dihydropyrimidines causes ring contraction into imidazoles, provided that the substituent R is capable of sufficiently stabilizing an anionic centre (R= 2-thiazolyl, 2-pyridyl, 4-pyridyl). Chemical evidence is presented to show that the