Benzomorphan related compounds: XXII. 11For part 21, see: J. Bosch, M. Rubiralta, M. Moral and J. Ariño, J. Chem. Soc. Perkin Trans. 1, 1986, 1533. Reduction of 3-( …

J Bonjoch, F Boncompte, N Casamitjana, J Bosch

Index: Bonjoch, Josep; Boncompte, Fontsanta; Casamitjana, Nuria; Bosch, Joan Tetrahedron, 1986 , vol. 42, # 24 p. 6693 - 6702

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Abstract

The first 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.