中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 2-(1-methylbenzimidazol-2-ylsulfanyl)-1-phenylethanone | 176103-68-7 | C16H14N2OS | 282.366 |
—— | (NZ)-N-[2-(1H-benzimidazol-2-ylsulfanyl)-1-phenylethylidene]hydroxylamine | —— | C15H13N3OS | 283.4 |
—— | 2-(N-methyl-benzimidazol-2-sulfanyl)-1-phenylethanol | 1110986-62-3 | C16H16N2OS | 284.382 |
We report herein on the utility of the Pfitzinger reaction in a facile two-step synthesis of the new heterocyclic ring system 6-arylbenzo[4,5]imidazolo[2,1-b]quino[4,3-e]-1,3-thiazin-14-one using microwave irradiation (MWI) and/or conventional heating. Microwave irradiation was used for a rapid and efficient synthesis of quinoline-4-carboxylic acids 6a - d from the reaction of isatin with 2-(1Hbenzimidazol- 2-ylthio)-1-arylethanones 3a - d. Cyclization of cinchoninic acids 6a - d afforded the fused title compounds 7a - d.