Benzomorphan related compounds. XIII. Syntheses of 2,6-methanopyrrolo[1,2-<i>d</i>] [1,4]diazocines
作者:J. Bosch、D. Mauleón、R. Granados
DOI:10.1002/jhet.5570170541
日期:1980.7
quaternization and borohydride reduction yields a mixture of isomeric tetrahydropyridines, precursors of the pyrrolodiazocine systems Ib and Ic. Structural and stereochemical assignment of the synthesized compounds are discussed.
描述了基于2-(1-吡咯基甲基)四氢吡啶的酸性环化的2,6-甲基吡咯并[1,2- d ] [1,4]重氮电影(I)的两种备选合成方法。在第一个合成路线中,氢化铝锂将2-氰基-1,4-二甲基-1,2,3,6-四氢吡啶(IIa)还原,然后使生成的伯胺与2,5-二乙氧基四氢呋喃反应可提供所需的四氢吡啶IVa。来自2-氰基-4,6-二甲基吡啶(V)的类似序列导致相应的2-(1-吡咯基甲基)吡啶VII,其通过季铵化和硼氢化物还原产生异构体四氢吡啶的混合物,即吡咯二偶氮胺系统Ib的前体和集成电路。讨论了合成化合物的结构和立体化学归属。
ROSCH, J.;FELIZ, M., AN. QUIM. PUBL. REAL SOC. ESP. QUIM., 1982, 78, N 2, 240-243
synthesis of an indolo[4,3-fg] morphan system has been achieved through a route involving the acid-catalyzed cyclization of a 3-(tetrahydro-2-pyridyl)indoline. A procedure for the reduction of 3-(tetrahydropyridyl) indoles to the corresponding, indolines, consisting in the formation of the tetrahydropyridine-borane complex followed by treatment with ethanolic hydrochloric acid. is established.