Trifluoroacetic acid → (2-ethanesulfonyl-ethyl)-methyl-(3H-3,4,8a-triaza-as-indacen-8-yl)-amine

Participants

Reaction Steps

(2-Ethanesulfonyl-ethyl)-methyl-[3-(2-trimethylsilanyl-ethoxymethyl)-3H-3,4,8a-triaza-as-indacen-8-yl]-amine (68 mg, 0.16 mmol) was taken up in methylene chloride (3 mL) and TFA (2 mL) and lightly capped and stirred for 2 hours. The volatiles were removed on the rotovap and the remainder was taken up in CH2C12 (25 mL). The volatiles were stripped and the remainder placed on a drying pump for 30 minutes. The material was taken up methylene chloride (2 mL) and ethylene diamine (2 mL) and stirred for 1.5 hours. Ethyl acetate (40 ml) and brine (40 mL) was added and the material shaken in a separatory funnel. The ethyl acetate phase was collected and washed with an equal volume of brine solution. The aqueous phases were back extracted with ethyl acetate (2×30 ml), the organics combined, dried (MgSO4), filtered and stripped. The crude was purified via preparative TLC using 7% MeOH in CH2Cl2 as eluant to provide 49 mg of (2-ethanesulfonyl-ethyl)-methyl-(3H-3,4,8a-triaza-as-indacen-8-yl)-amine as a green-black crystalline solid. MS (M+H)+=291.

Provenance & Evidence