Palladium-catalyzed chemoselective intramolecular cyclization of bromoanilinoalkenenitriles
作者:Chau-Chen Yang、Huo-Mu Tai、Pei-Jiun Sun
DOI:10.1039/a702710i
日期:——
α-(o-Bromoanilino)alkenenitriles 1a–f and 2a–e and α-(N-alkenylamino)-β-(o-bromophenyl)propanenitrile 7a–c< and 8a–c undergo palladium-catalyzed conversion into o-(methylamino)benzonitrile 12, o-[(alkenylamino)ethenyl]benzonitriles 24a–c, N-alkenylanilines 26b, 26c, 3-benzazepines 29a, 29c, 31a and 32a, γ-carbolines 36 and pyrrolo[3,2-b]indole 45. The reactions involve intramolecular additions of arylpalladium
α-(o-溴苯胺基)丙烯腈1a-f和2a-e和α-(N-链烯基氨基)-β-(o-溴苯基)丙烷腈7a-c <和8a-c经历钯催化转化为o-(甲基氨基) )苄腈12,邻-[((烯基氨基)乙烯基]苄腈24a-c,N-烯基苯胺26b,26c,3-苯并ze庚因29a,29c,31a和32a,γ-咔啉36和吡咯并[3,2- b ]吲哚45该反应涉及将芳族钯分子内加成到氰基上,以及随后的过程,例如氰基基团的转位,水解,电环化,乙基基团的转移和氧化芳构化。提出了氰基钯催化芳基化的一般机理。