2573-2576An interesting observation was made
during the electrophilic substitution of indole with 5,5-dimethyl cyclohexane 1,3-dione
resulting in the synthesis of 2,3,4,5, 10,11- hexahydro-3,3-dimelhyl-11-
(indo-3-yl)-dibenz-[b,f]azepine-1-one system. The reactions with 2-methyl- and 3-methyl
indoles resulted in the formation of only the 1:1 product. The structures of the
products have been settled on the basis of their UV, IR.1H and 13C
NMR spectral studies and MS analysis