新型的二吡啶并[1,2- a ; 3',4'- d ]咪唑7a - d,二吡啶并[1,2- a ; 4',3'- d ]咪唑8a,c和吡啶[1',2' ; 1,2]咪唑并[4,5- d ]哒嗪衍生物9a - d的合成途径有两种:3-烯基咪唑并吡啶-2-肟10的热电环反应以及甘氨酸乙酯(或肼)与2,3的直接缩合。 -二羰基咪唑并[1,2- a ]吡啶11。
N-Azinylpyridinium N-aminides: tandem reactions with α-halocarbonyl derivatives and analogs
摘要:
Pyridinium-N-(2'-pyridyl)aminide was reacted with different alpha-halocarbonyl derivatives and related compounds. The method allows an easy preparation of several heterocyclic building blocks, all including the 2-aminopyridine moiety. (C) 2000 Published by Elsevier Science Ltd.