The Wender and Bischler indole syntheses have been investigated as potential routes to dihydroindenoindoles. Thus a Wender reaction between N, 2-dilithio-N-trifluoroacetylaniline and 2-bromo-5-methoxy-4, 6-dimethylindanone affords the corresponding dihydroindeno [1, 2-b]. In general, however, indolisations of this type are limited to 2-halogenoindanones bearing electron donating groups conjugated with the carbonyl function since these ...
![5,6-dihydroindeno[2,1-b]indole Structure](https://image.chemsrc.com/caspic/149/7156-31-2.png)
