Synthesis of substituted pyrido[1,2-a]pyrimidines from 2-arylmethylidene-3-fluoroalkyl-3-oxopropionates
作者:M. V. Pryadeina、Ya. V. Burgart、M. I. Kodess、V. I. Saloutin
DOI:10.1007/s11172-006-0198-y
日期:2005.12
both the polyfluoroacylvinyl and alkoxycarbonylvinyl fragments to give alkyl 4-aryl-2-polyfluoroalkyl-4H-pyrido[1,2-a]pyrimidine-3-carboxylates and 4-aryl-2-hydroxy-3-polyfluoroacyl-4H-pyrido[1,2-a]pyrimidines, respectively. When treated with copper(II) acetate, the pyrido[1,2-a]pyrimidines yield metal complexes.
2-芳基亚甲基-3-氟代烷基-氧代丙酸酯与 2-氨基-吡啶的环缩合发生在多氟酰基乙烯基和烷氧基羰基乙烯基片段处,得到烷基 4-芳基-2-多氟烷基-4H-吡啶并[1,2-a]嘧啶-3-分别为羧酸盐和 4-芳基-2-羟基-3-多氟酰基-4H-吡啶并[1,2-a]嘧啶。当用乙酸铜 (II) 处理时,吡啶并 [1,2-a] 嘧啶生成金属配合物。
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作者:M. V. Pryadeina、O. G. Kuzueva、Ya. V. Burgart、V. I. Saloutin
DOI:10.1023/a:1015565700648
日期:——
Depending on conditions, fluorinated 3-oxoesters in reactions with benzaldehyde afford either 2-benzylidene-3-fluoroalkyl-3-oxoesters or 3,5-dialkoxycarbonyl-2,6-dihydroxy-2,6-difluoroalkyl-4-phenyltetrahydropyrans. The latter were also obtained by treating 3-oxoesters with 2-benzylidene-3-oxoesters. Pentafluorobenzoylacetate with benzaldehyde furnishes 3,5-diethoxycarbonyl-2-pentafluorophenyl-4-phenyl-7,8,9,10-tetrafluoro-4,5-dihydrobenzo[b]oxacin-6-one.