Isopropylethylamine → (1,1-dimethylethyl) 3-[[5-ethyl-6-[4-(methoxycarbonyl)-1-piperidinyl]-4-pyrimidinyl]amino]-N-[(phenylmethoxy)carbonyl]alaninate

Participants

Reaction Steps

A mixture of 1.2 g (2.8 mmoles) of (1,1-dimethylethyl) 3-[(6-chloro-5-ethyl-4-pyrimidinyl)amino]-N-[(phenylmethoxy)carbonyl]alaninate, 5 ml of methyl 4-piperidinylcarboxylate and 1 ml of isopropylethylamine is heated between 110 and 120° C. for 4 hours. After cooling down to ambient temperature, the reaction medium is taken up in ethyl acetate, water and a saturated solution of sodium bicarbonate. The organic phase is separated, dried over magnesium sulphate then concentrated to dryness under vacuum. The residue is chromatographed on silicagel with a gradient of pure heptane to pure ethyl acetate. 260 mg (Yield=17%) of expected product is obtained in the form of an oil.

Provenance & Evidence