Water → Methyl 2-chloroquinazoline-7-carboxylate

Participants

Reaction Steps

To a solution of methyl 2,4-dichloroquinazoline-7-carboxylate (1250 mg, 4.86 mmol) in EtOAc (100 mL) at R.T. was added Hunig's base (0.847 mL, 4.86 mmol) to form a pale yellow solution. The Pd catalyst was added and the mix hydrogenated with a H2 balloon for 1 hour. Water (20 mL) was added to solubilize salts, and mix filtered to remove Pd. The aqueous layer separated and organics dried over MgSO4, filtered and stripped to yield a residue (yellow solid) that was purified by Biotage 40M chromatography (loaded in DCM) eluting with 15-60% EtOAc/Hex over 2000 mL to afford the title compound as a pale yellow solid, 724 mg, 67%. 1H NMR (400 MHz, DMSO-D6) δ ppm 9.75 (1H, s) 8.45 (1H, s) 8.37 (1H, d, J=8.34 Hz) 8.13-8.30 (1H, m) 3.96 (3H, s); MS (API+) for C10H7N2ClO2 m/z 223.1 (M+H)+.

Provenance & Evidence