作者:V.I Saloutin、Ya.V Burgart、O.G Kuzueva、C.O Kappe、O.N Chupakhin
DOI:10.1016/s0022-1139(99)00216-x
日期:2000.4
Condensation of fluorinated 3-oxo esters or 1,3-diketones with benzaldehyde and (thio)urea results in the diastereoselective formation of 4-fluoroalkyl-4-hydroxy-2-oxo(thioxo)-6-phenyl-hexahydropyrimidine-5-carboxylates from which by dehydration under acidic conditions the corresponding 6-fluoroalkyl-2-oxo(thioxo)-4-phenyl-1,2,3,4-tetrahydropyrimidine-5-carboxylates were obtained. Under the same conditions
含氟的3-氧代酯或1,3-二酮与苯甲醛和(硫代)脲的缩合导致4-氟烷基-4-羟基-2-羟基-2-氧代(硫代)-6-苯基-六氢嘧啶-5-羧酸酯的非对映选择性形成通过在酸性条件下脱水,得到相应的6-氟烷基-2-氧代(硫代)-4-苯基-1,2,3,4-四氢嘧啶-5-羧酸酯。在相同条件下,六氟乙酰丙酮提供4,6-二羟基-4,6-二(三氟甲基)-六氢嘧啶-2-酮。描述了这些嘧啶衍生物导致稠合杂环的一些其他反应。