Kjr. Prasad et Cs. Vijayalakshmi, SYNTHESIS OF 4-METHYL-1-OXO-TETRAHYDROCARBAZOLES, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 33(5), 1994, pp. 481-482
Condensation of the diazotised aniline derivatives (1a-d) with 2-hydro
xymethylene-4-methylcyclohexanone (2) affords the respective monoarylh
ydrazones (3a-d) which on cyclisation with a mixture of acetic acid an
d hydrochloric acid furnish the title compounds, 4-methyl-4-oxo-1,2,3,
4-tetrahydrocarbazoles (4a-d).