synthesis of 3. As the most effective route, Newman-Kwart rearrangement of benzazocines was selected and closely investigated. 8-(N,N-Dimethylthiocarbamoyl)oxy derivatives (6a-e) rearranged to 8-(N,N-dimethylcarbamoyl)thio derivatives (7a-e) in good yields. Reductive cleavage of 7a-e and subsequent methylation or acylations gave the title compounds (3, 8-24). Although analgesic activities of sulfur-containing
通过三种不同的途径将8-
酚的1,2,3,4,5,6-六氢-2,6-甲氧基-3-苯并偶氮
恶唑转化为相应的8-
硫酚类似物。8-
氨基-2,6-甲基-3-苯甲唑啉重氮化(2),然后与CH3SNa反应,得到8-(甲
硫基)-1,2,3,4,5,6-六氢-2,6-甲基-3-苯甲唑啉(3)。还研究了使用Grewe环化的另一条路线来合成3。作为最有效的路线,选择并仔细研究了苯佐唑啉的Newman-Kwart重排。8-(N,N-
二甲基硫代
氨基甲酰基)氧基衍
生物(6a-e)以高收率重排为8-(N,N-二甲基
氨基甲酰基)
硫基衍
生物(7a-e)。7a-e的还原裂解以及随后的甲基化或酰化得到标题化合物(3,8-24)。