Synthesis of New Heterocyclic Compounds by the Skraup Reaction of Amino-9H-thioxanthen-9-ones.
作者:Hidetoshi FUJIWARA、Ichizo OKABAYASHI
DOI:10.1248/cpb.42.1322
日期:——
The Skraup reaction of amino-9H-thioxanthen-9-ones was conducted in the presence of glycerol, fuming sulfuric acid, nitrobenzone, iron(II) sulfate and boric acid. 1-Amino-9H-thioxanthen-9-one (1) gave 12H-[1]benzothiopyrano[2, 3-h]quinolin-12-one (5). 2-Amino-(2) and 3-amino-9H-thioxanthen-9-ones (3) gave angular-type products, 12H-[1]benzothiopyrano[3, 2-f]quinolin-12-one (6) and 7H-[1]benzothiopyrano[2, 3-f]quinolin-7-one (8), but did not give linear-type products. 4-Amino-9H-thioxanthen-9-one (4) gave 7H-[1]benzothiopyrano[3, 2-h]quinolin-7-one(10).
氨基-9H-噻吩喹啉-9-酮的斯克劳普反应在甘油、熏硫酸、硝基苯、亚铁硫酸盐和硼酸的存在下进行。1-氨基-9H-噻吩喹啉-9-酮(1)生成了12H-[1]苯并噻吩吡喃[2, 3-h]喹啉-12-酮(5)。2-氨基(2)和3-氨基-9H-噻吩喹啉-9-酮(3)则给出了角型产物12H-[1]苯并噻吩吡喃[3, 2-f]喹啉-12-酮(6)和7H-[1]苯并噻吩吡喃[2, 3-f]喹啉-7-酮(8),但未生成线型产物。4-氨基-9H-噻吩喹啉-9-酮(4)生成了7H-[1]苯并噻吩吡喃[3, 2-h]喹啉-7-酮(10)。