Some 3a-alkyl-2,3,3a,4,5,10-hexahydro-1H-pyrrolo[1,2-b][2,4]benzodiazepines and 4a-alkyl-1,2,3,4,4a,5,6,11-octahydropyrido[1,2-b][2,4]benzodiazepines have been prepared by reduction of the corresponding 1-oxo-compounds. The latter were synthesised by the condensation of o-phenylenebismethylamine with the appropriate oxo-ester.
P. Knowles and K. R. H. Wooldridge, J. Chem. Soc., Perkin Trans. 1, 1972, 975 DOI: 10.1039/P19720000975
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