Meisenheimer rearrangement of azetopyridoindoles. Part 4. Ring expansion of 2-vinyl-1,2,4,5,10,10b-hexahydroazeto[1′,2′:1,2]pyrido[3,4-b]indole N-oxides
作者:Takushi Kurihara、Yasuhiko Sakamoto、Kiyoko Tsukamoto、Hirofumi Ohishi、Shinya Harusawa、Ryuji Yoneda
DOI:10.1039/p19930000081
日期:——
derivative 7 gave the hexahydroisoxazolo[2′,3′:1,2]pyrido[3,4-b]indole 8via the [1,2]-Meisenheimer rearrangement of the corresponding N-oxide. Stereoscopic X-ray molecular structures for (13-methyl-1,4,7,8,13,13-bhexahydro[1′,2′]oxazepino[2′,3′:1,2]pyrido[3,4-b]indol-1-yl)methanol 3 and (11-methyl-2-vinyl-1,2,5,6,11,11b-hexahydro isoxazolo[2′,3′:1,2]pyrido[3,4-b]indol-1-yl)methanol 12 are presented.
1,2-顺式-1,2,4,5,10,10b-六氢a并[1',2':1,2]吡啶[3,4- b ]吲哚-1-羧酸衍生物1a - d和5与米在二氯甲烷氯过苯甲酸,得到六氢[1',2']氧杂氮杂[2',3':1,2]吡啶并[3,4 b ]吲哚-1-羧酸盐2A - d和6,这通过N-氧化物的[2,3] -Meisenheimer重排,具有12个碳原子的兽药骨架。另一方面,相应的1,2-反式衍生物7的过酸氧化通过相应的N-氧化物的[1,2] -Meisenheimer重排得到六氢异恶唑并[2',3':1,2]吡啶[3,4- b ]吲哚8。(13-甲基-1,4,7,8,13,13-bhexahydro [1',2'] oxazepino [2',3':1,2] pyrido [3,4-的立体X射线分子结构b ]吲哚-1-基)甲醇3和(11-甲基-2-乙烯基-1,2,5,6,11,11b-六氢异恶唑并[2',3':1