Methyl acetoacetate → HCID 178429400, compound

Participants

Reaction Steps

To a solution of (S)-1-phenylethylguanidine (1 g, 6.13 mmol, 1 eq) [prepared by condensation of (S)-1-phenylethylamine with methylthiopseudourea sulfate in refluxing aqeous sodium bicarbonate] in methanol (5.8 mL) was added a solution of 25% NaOMe in MeOH (4.2 mL, 18.39 mmol, 3 eq). To this stirred solution was added methyl acetoacetate (0.66 mL, 6.13 mmol, 1 eq) dropwise via syringe. The mixture was allowed to stir overnight. The methanol was removed by warming under a flow of air. The residue was dissolved in 20 mL water, acidified with concentrated aqueous HCL and extracted with ether and the ether layer discarded. The aqueous layer was neutralized and extracted with ethyl acetate. The organic extracts were combined and dried over anhydrous Na2SO4, filtered and concentrated. The material was purified by flash column chromatography to give 181 mg of the title compound. Mass spectrum (NH3/CI): 230.2 (M+1).

Provenance & Evidence