3-Unsubstituted 1-benzofurans 1e and 1f, 3-methyl-1-benzofurans 1a-1d, and 3-amino-1-benzofurans 2a-2l, as well as 3-amino-1-benzothiophenes 3a, 3b and 3-aminoindoles 4a-4f, 11a, and 11b were prepared and tested as analgesics. The 3-amino-1-benzofurans 2 were prepared from the corresponding 2-hydroxybenzonitriles 5 and phenacyl bromides 6 via intermediates 7. Similar treatment of 2-sulfanylbenzonitrile (8) provided 3-amino-1-benzothiophenes 3. Appropriately substituted 2-aminobenzonitriles 9 then provided N-substituted 3-aminoindoles 4. 1-(Ethoxycarbonyl)indoles 4e and 4f were successfully deprotected giving indoles 11a and 11b, respectively.
3-未取代的1-苯并呋喃1e和1f,3-甲基-1-苯并呋喃1a-1d,以及3-氨基-1-苯并呋喃2a-2l,以及3-氨基-1-苯并噻吩3a,3b和3-氨基吲哚4a-4f,11a和11b被制备并作为镇痛药进行测试。3-氨基-1-苯并呋喃2是从相应的2-羟基苯甲腈5和苯乙酮溴化物6经过中间体7制备的。对2-硫代基苯甲腈(8)的类似处理提供了3-氨基-1-苯并噻吩3。适当取代的2-氨基苯甲腈9然后提供了N-取代的3-氨基吲哚4。1-(乙氧羰基)吲哚4e和4f成功脱保护,分别给出吲哚11a和11b。