Trifluoroacetic acid → 4-Aminoisoquinoline-1-carbonitrile

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Reaction Steps

Compound 470C (50 mg, 0.16 mmol) was treated with trifluoroacetic acid (0.5 mL) for 1 h. The highly colored mixture was partitioned between ethyl acetate (30 mL) and 1N NaOH (30 mL). After washing with brine (15 mL), the organic layer was dried over magnesium sulfate and concentrated in vacuo to afford 24 mg (92%) of compound 470D as a yellow solid. HPLC: 99% at 1.09 min (retention time) (Phenomenex C-18, 5 micron column, 4.6×30 mm, eluting with 10-90% aqueous methanol over 2 mincontaining 0.1% TFA, 4 mL/min, monitoring at 254 nm). MS (ES+): m/z 170.2 [M+H]+.

Provenance & Evidence