Synthesis of<i>N</i>-(substituted phenylcarbonylamino)-4-ethyl-1,2,3,6-tetrahydropyridines as potential nonsteroidal anti-inflammatory agents
作者:Kyoung Jin P. Yoon、Bala Kode、Lynneice Bowen、Kinfe K. Redda
DOI:10.1002/jhet.5570380110
日期:2001.1
Fourteen novel N-(substituted phenylcarbonylamino)-4-ethyl-1,2,3,6-tetrahydropyridines 9 were synthesized in fair to good yields. 4-Ethylpyridine 5 reacted with O-mesitylenesulfonylhydroxylamine (O-MSH) 4 to furnish N-amino-4-ethylpyridinium mesitylenesulfonate 6. The reaction of 6 with substituted acid chlorides 7 gave the stable crystalline pyridinium ylides 8a-8n. A sodium borohydride reduction
以合理的产率合成了十四个新颖的N-(取代的苯基羰基氨基)-4-乙基-1,2,3,6-四氢吡啶9。4-乙基吡啶5与O-间苯甲基磺酰基羟胺(O -MSH)4反应,制得N-氨基-4-乙基吡啶基间苯磺酸磺酸盐6。6与取代的酰氯7的反应得到稳定的结晶吡啶鎓烷基化物8a-8n。硼氢化钠在无水乙醇中的还原度为8,提供了目标化合物N-(取代的苯基羰基氨基)-4-乙基-1,2,3,6-四氢吡啶9a-9n。