Isoamylamine → HCID 11382214, compound

Participants

Reaction Steps

Add Ti(iPrO)4 (1.70 g, 6.00 mmol) to a suspension of 6-(1-oxo-indan-5-yloxy)nicotinamide (Intermediate 4, 805 mg, 3.00 mmol), isoamyl amine (314 mg, 3.60 mmol) and THF (10 ml) and stir overnight under a nitrogen atmosphere at ambient temperature. Treat the reaction mixture with a solution of TiCl4 (1.0M/DCM, 6.00 ml, 6.00 mmol) and stir at ambient temperature for three hours before adding NaBH3CN (377 mg, 6.00 mmol) dissolved in MeOH (5 ml). After an additional three hours, quench the reaction with 2N aq. NaOH, making the suspension basic. Stir the suspension for one hour and filter through a filter aid to remove solids, washing them with EtOAc. Separate layers in the filtrate/wash and wash the organic layer with brine before drying (MgSO4) and concentrating. Purify on silica gel (5% (1N NH3/MeOH)/45% EtOAc/DCM) to obtain 491 mg of the title compound as a light yellow solid. Mass spectrum (ion spray): m/z=340 (M+1); 1HNMR (CDCl3): 8.59 (s, 1H), 8.16 (d, 1H), 7.39 (d, 1H), 7.00 (s, 1H), 6.97-6.94 (m, 2H), 5.87 (br. s, 2H), 4.25 (t, 1H), 3.02 (m, 1H), 2.83 (m, 1H), 2.75 (t 2H), 2.46 (m, 1H), 1.89 (m, 1H), 1.67 (m, 1H), 1.44 (m, 2H), 0.92 (d, 6H).

Provenance & Evidence