Generation of 3-piperidine(methan)amines and cyclic 3-piperidine-methanamines as potential substance P antagonists
摘要:
A general method is described for the synthesis of 3-piperidine(methan)amines and their cyclic analogues. The 3,5-dichloro-2H-1,4-oxazin-2-ones 6 and 3-aryl substituted analogues are reacted with acetylenic dienophiles yielding pyridines. Further catalytic hydrogenation and functional group transformation (1) or substitution (2-3) with ring closure reactions (4) followed by hydrogenation provided the 2,3,5-cis substituted piperidines 1-3 and a cis substituted [3,4-c]pyrrolopiperidine 4. These compounds have recently raised great interest due to their Substance P antagonist profiles. (C) 1997 Elsevier Science Ltd.
通过与取代的炔属化合物的环加成消除反应,合成3-官能化的5-氯-6-甲基-2 H -1,4-恶嗪-2-酮和吡啶。
摘要:
通常在适当的条件下,通过亲电催化避免内酯功能的反应,在3,5-二氯-6-甲基-2 H -1,4-恶嗪-2-酮中实现氯亚胺基的选择性官能化。已表明3-取代的5-氯-6-甲基-2 H -1,4-恶嗪-2-酮中的氮杂二烯体系易于与单取代的炔属化合物反应,并通过环加成消除法以优异的收率得到多官能化吡啶。讨论了通常较高的区域选择性及其对3-取代基性质的依赖性。
Van der Eycken, Erik; Jidong, Zhang; Kilonda, Amuri, Journal of the Chemical Society. Perkin Transactions 2 (2001), 2002, # 5, p. 928 - 937
作者:Van der Eycken, Erik、Jidong, Zhang、Kilonda, Amuri、Compernolle, Frans、Toppet, Suzanne、Hoornaert, Georges、Van der Auweraer, Mark、Jackers, Carine、Verbouwe, Wouter、De Schryver, Frans C.