Process for the preparation of derivatives of 1,1,2-trialkyl-1H-indene derivatives from 2- (1,1,2-trialkyl-3-oxopropyl) benzaldehyde

Process for the preparation of derivatives of 2-alkyl-1H-indene and 2,3,4,4a-tetrahydro-1H-fluorene from derivatives of 2- (2-alkyl-3-oxopropyl) benzaldehyde and 2- (2 -formilciclohexil) benzaldehyde respectively. # the present invention discloses a process for the preparation of derivatives of 2-alkyl-1H-indene and 2,3,4,4a-tetrahydro-1H-fluorene derivatives by acid treatment 2 - (2-alkyl-3-oxopropyl) benzaldehyde and 2- (2-formilciclohexil) benzaldehyde respectively.