Ammonia → 6'-Bromo-5-methyl-2'',3'',5'',6''-tetrahydro-3'H-dispiro[imidazole-2,1'-indene-2',4''-pyran]-4-amine

Participants

Reaction Conditions

Reaction Steps

6′-Bromo-5-methyl-2″,3″,5″,6″-tetrahydro-3′H-dispiro[imidazole-2,1′-indene-2′,4″-pyran]-4(3H)-thione (Example 25 Step 3, 415 mg, 1.14 mmol) was taken up in NH3 (7M in MeOH, 13 mL, 91 mmol) and the resulting mixture was heated in a microwave reactor at 120° C. for 2×1 h. The mixture was concentrated and the resulting residue was taken up in NH3 (7M in MeOH, 13 mL, 91 mmol) and then heated again for 1 h at 120° C. The mixture was concentrated and the resulting residue was taken up in DCM (10 mL) and sat. aq. NaHCO3 (5 mL) and poured into a phase separator. The organic layer was collected, concentrated and purified on a silica gel column eluted with 0-10% (0.1 M NH3 in MeOH) in DCM to give 295 mg (75% yield) of the title compound: 1H NMR (400 MHz, DMSO-d6) δ ppm 7.36 (dd, 1H), 7.27 (d, 1H), 6.68 (d, 1H), 6.65 (br. s, 1H), 3.65 (m, 2H), 3.46 (m, 1H), 3.38 (m, 1H), 3.15 (m, 1H), 3.00 (m, 1H), 2.18 (s, 3H), 1.66 (td, 1H), 1.19 (m, 3H); MS (ES+) m/z 348[M+H]+.

Provenance & Evidence