Trifluoroacetic acid → 4-Aminoisoquinoline-1-carbonitrile
Reaction equation
COC1C=C(OC)C=CC=1C[NH:6][C:7]1[C:16]2[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=2)[C:10]([C:17]#[N:18])=[N:9][CH:8]=1.FC(F)(F)C(O)=O>>[NH2:6][C:7]1[C:16]2[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=2)[C:10]([C:17]#[N:18])=[N:9][CH:8]=1Participants
3
Procedure
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 min containing 0.1% TFA, 4 mL/min, monitoring at 254 nm). MS (ES+): m/z 170.2 [M+H]+.
Workup
- customThe highly colored mixture was partitioned between ethyl acetate (30 mL) and 1N NaOH (30 mL)