Methanol → HCID 21076923, compound

Participants

Reaction Steps

To a solution of 1-benzyl-2-{(R)-[(3-tert-butoxycarbonylamino-propyl)-(1-p-tolyl-methanoyl)-amino]-methyl-propyl}-4-methyl-6-oxo-1,6-dihydro-pyrimdine-5-carboxylic acid methyl ester (2.75 g, 4.55 mmol) in THF (60 mL) was added MeOH (30 mL) followed by 1N KOH (18.2 mL, 18.2 mmol). The resultant solution was heated to 60° C. for 3 h, then concentrated under reduced pressure. The residue was diluted with H2O (75 mL), adjusted to pH˜7 with 1N HCl, and extracted with EtOAc (3×75 mL). The extracts were dried over Na2SO4, filtered and concentrated under reduced pressure to give 2.69 g (100%) of 1-benzyl-2-{(R)-[(3-tert-butoxycarbonylamino-propyl)-(1-p-tolyl-methanoyl)-amino]-methyl-propyl}-4-methyl-6-oxo-1,6-dihydro-pyrimidine-5-carboxylic acid as an oil which was used in the subsequent step without purification: MS (ES) m/e 591.4 (M+H)+.

Provenance & Evidence