Hydrochloric Acid → HCID 66697278, compound

Participants

Reaction Steps

A 1M solution of tert-butylmagnesium chloride (CAS Reg. No. 677-22-5) in diethyl ether (2.1 ml) was added to 2-chloro-4-methoxyphenylacetic acid (CAS 91367-09-8) (200 mg) in THF (5 ml). The mixture was stirred at room temperature for 30 min. A solution of 4-methyl-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazine-7-carboxylic acid methyl ester (200 mg, CAS Reg. No. 201294-27-1) in THF (3 ml) was added and the resulting mixture was stirred overnight. Aqueous HCl (25%, 0.5 ml) and water (10 ml) were added and extracted with EtOAc. The combined organic layers were dried over Na2SO4 and then concentrated to an oil. The residue was purified by flash chromatography (SiO2, 10 to 50% EtOAc/heptane) to give the title compound (100 mg) as a light yellow solid. MS (m/e)=346.1 [M+H+].

Provenance & Evidence