Abstract
Alkylation of 2,3,3-trimethyl- and 2,3,3,5-tetramethyl-3H-indoles with 2-bromomethylbenzonitrile gave 2-methylene-1-(2-cyanobenzyl)-2,3-dihydro-1H-indoles. When treated with lithium aluminum hydride the latter are cyclized to 11,12,12a,13-tetrahydro-6H-indolo[1,2-b][2,4]benzodiazepines.
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