Trifluoroacetic acid → 7-chloro-6-[2-(cyclopropylmethyl-amino)-thiazol-5-ylthiomethyl]-2,3,4,5-tetrahydro-1H-benzo[d]azepine

Participants

Reaction Steps

To a solution of 3-tert-butoxycarbonyl-7-chloro-6-[2-(cyclopropylmethyl-amino)-thiazol-5-ylthiomethyl]-2,3,4,5-tetrahydro-1H-benzo[d]azepine (0.113 g, 0.237 mmol) in anhydrous DCM (4.9 mL) at room temperature add trifluoroacetic acid (4.9 mL) and stir the solution at room temperature overnight. Concentrate in vacuo and elute the residue through a SCX column (20 g). Dissolve the residue in DCM, load the solution on to an Analogix® column (40 g) and purify the crude mixture by preparative liquid chromatography (100:0 to 90:10 DCM/2M ammonia in methanol over 30 min; 90:10 DCM/2M ammonia in methanol over 33 min; 35 mL/min) to afford 7-chloro-6-[2-(cyclopropylmethyl-amino)-thiazol-5-ylthiomethyl]-2,3,4,5-tetrahydro-1H-benzo[d]azepine (0.075 g, 83%). MS (ES+) m/z: 380.1 (M+H)+.

Provenance & Evidence