SYNTHESIS AND BIOLOGICAL ACTIVITIES OF SOME NEW 3H-QUINAZOLIN-4-ONE DERIVATIVES DERIVED FROM 3-PHENYLAMINO- 2-THIOXO-3H-QUINAZOLIN-4-ONE
作者:Mohamed A. Saleh、Yehia A. Hafez、Foad E. Abdel-Hay、Wagdy I. Gad
DOI:10.1080/10426500490262559
日期:2004.2.1
afforded 1,3,4-oxadiazole-2-thione derivative 10. Compound 1 reacted namely with 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosylbromide, 2,3,4,6-tetra-O-acetyl-α-D-galactopyranosyl bromide, or with 2,3,4-tri-O-acetyl-α-D-xylopyranosyl bromide to yield S-glycoside derivatives 11–13, respectively. Oxidation of S-glucoside 11 with H 2 O 2 afforded the corresponding sulphone; 2-(2′,3′,4′,6′-tetra-O-acetyl-β-D-gluc
3-苯基氨基-2-硫代-3H-喹唑啉-4-酮 (1) 与甲基碘、α-氯乙酸乙酯和 α-溴苯甲酰苯乙酮在甲醇中在 KOH 存在下加热反应导致硫原子上的烷基化为 2 -烷基硫代衍生物2-4,分别。用 α-溴-α-氰基乙酸乙酯处理 1 得到 3-羟基-10-氧代-4-苯基-4H,10H-1-thia-4,4a,9-triaza-anthrancene-2-carbonitrile (5)。酯3与水合肼反应得到酰肼6。酰肼6与苯甲酰丙酮、二苯甲酰甲烷和乙酰乙酸乙酯反应分别得到相应的吡唑7和8以及吡唑酮9。6 用甲醇 KOH 和二硫化碳处理得到 1,3,4-恶二唑-2-硫酮衍生物 10。化合物 1 即与 2,3,4,6-四-O-乙酰基-α-D-吡喃葡萄糖基溴反应,2 ,3,4, 6-四-O-乙酰基-α-D-吡喃半乳糖基溴化物,或与2,3,4-三-O-乙酰基-α-D-吡喃木糖基溴化物分别生成S-糖苷衍生物11-13。S-葡萄糖苷11用H