Investigation of the synthesis and analgesic activity of 1-substituted 4-(propananilido)perhydroazepines
作者:Jack Deruiter、Shridhar Andurkar、Thomas N. Riley、Donald E. Walters、F. Taylor Noggle
DOI:10.1002/jhet.5570290417
日期:1992.7
Methods are explored to enhance the efficiency and versatility of the synthesis of the 1-substituted 4-(propananilido)perhydroazepine analgesics. The modified synthesis begins with ring expansion of 1-carbethoxy-4-piperidinone 3 with ethyl diazoacetate and boron trifluoride to yield 1,5-biscarbethoxyperhydroazepin-4-one 4. Selective hydrolysis of 4 followed by decarboxylation provides 1-carbethoxy
探索了提高1-取代的4-(丙烷基)过氢hydro庚因镇痛药的合成效率和多功能性的方法。改性合成开始于用重氮乙酸乙酯和三氟化硼将1-carbethoxy-4-piperidinone 3扩环,得到1,5-biscarbethoxyperhydroazepin-4-one 4。4的选择性水解,然后进行脱羧,生成1-carbethoxyperhydroazepin-4-one 6。6用苯胺还原胺化得到4-苯胺基中间体7,将其用丙酸酐处理,得到1-carbethoxy-4-(propananilido)perhydroazepine 18。用三甲基甲硅烷基碘完成对18的1-甲乙氧基的选择性裂解,得到通用的中间体4-(丙酰胺基)-全氢氮杂环庚烷19。用氧化苯乙烯处理19得到1- [2-(1-羟基-1-苯基) [乙基]衍生物1c,在甩尾试验中显示出比以前报道的该系列药物更大的镇痛潜力。