Synthesis of 1H-4, 4a, 5, 9b-tetrahydroindeno [1, 2-b] pyridines has been accomplished by catalytic hydrogenation of 4H-4a-5-dihydroindenopyridines. The isomerization of 1H-4, 4a, 5, 9b-tetrahydroindenopyridines containing an acyl function at C-3 leads to 3H-4, 4a, 5, 9b- tetrahydroindenopyridines in acidic medium.