-chromen-4-one 1 has resulted in the formation of new 5-[(7-hydroxy-4-oxo-4 H -chromen-3-yl)methylene]-1,3-disubstitutedpyrimidine-2, 4, 6 (1 H , 2 H , 3 H )-triones 3a – g . These compounds have used for the synthesis of medicinally important 5-[(7- o - β - d -glucopyranosyloxy-4-oxo-4 H -chromen-3-yl)methylene]-1,3-disubstitutedpyrimidine-2,4,6(1 H ,2 H ,3 H )-triones 6a – g using α-acetobromoglucose (ACBG) as
3-formyl-4 H -chromen-4-one 1 将几个 1,3-di取代pyrimidine-2,4,6(1 H ,2 H ,3 H )-triones 2a – g 缩合形成新的 5-[(7-hydroxy-4-oxo-4 H -chromen-3-yl)methylene]-1,3-di取代pyrimidine-2, 4, 6 (1 H , 2 H , 3 H )-triones 3a – G 。这些化合物已用于合成医学上重要的 5-[(7-o-β-d-
吡喃
葡萄糖基氧基-4-oxo-4 H -chromen-3-yl)methylene]-1,3-di取代pyrimidine-2,4, 6(1 H ,2 H ,3 H )-triones 6a – g 使用 α-
乙酰溴葡萄糖 (ACBG) 作为
葡糖基化剂,在
十二烷基三甲基
溴化铵 (DTMAB) 作为相转移催化剂的情况下。产物结构经