Synthesis of Thieno[3,2-e][1,2,4]Triazolo[1,5-c]pyrimidin-5(6H)-ones via Their [1,2,4]triazolo[4,3-c]pyrimidine Compounds as New Ring Systems by Dimroth-Type Rearrangement
作者:Tomohisa Nagamatsu、Shoeb Ahmed、Abugafar M. L. Hossion、Seiji Ohno
DOI:10.3987/com-07-s(u)58
日期:——
ones (llc-j), are described as novel ring systems and as a new class of potential xanthine oxidase inhibitors. The | 1,5-c| isomers (6a-c) were further prepared by condensation of 3-amino-4-imino-2-oxo-1,2,3,4-tetrahydrothieno|2,3-d(pyrimidine (14) with appropriate triethyl orthoesters as a synthetic method for a reliable structure of the tricyclic ring systems.
- thieno|3,2-e|[1,2,4|triazolo|,5-c|-pyrimidin-5(6H)-one (6a) 及其 2-取代衍生物 (6b-j) 的一般和简便合成) 由它们的|4,3-c| 瞬时异构化产生 化合物(7a-j),其通过4-肼基噻吩|2,3-d(嘧啶-2(1H)-one(10)与适当的原三乙酯缩合或通过4-(亚苄基肼基)噻吩的氧化环化制备| 2,3-d(pyrimidin-2(1H)-ones (llc-j),被描述为新型环系统和一类新的潜在黄嘌呤氧化酶抑制剂。| 1,5-c| 异构体 (6a-c ) 通过将 3-氨基-4-亚氨基-2-氧代-1,2,3,4-四氢噻吩|2,3-d(嘧啶 (14) 与适当的原三乙酯缩合作为一种可靠的合成方法进一步制备三环系统的结构。