Diisopropyl Ether → (S)-N-(a-ethylbenzyl)-3-[2-(4-pyridylacetyl)aminoethoxy]-2-phenylquinoline-4-carboxamide

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반응 단계

0.41 g (2.4 mmol) of 4-pyridylacetic acid hydrochloride were suspended in 80 ml of CH2Cl2; the suspension was cooled to 0° C. and 0.33 ml (2.4 mmol) of TEA, 0.64 g (4.7 mmol) of HOBT and 1.0 g (2.4 mmol) of (S)-N-(α-ethylbenzyl)-3-(2-aminoethoxy)-2-phenylquinoline-4-carboxamide (compound of Description 4) were added. 0.58 g (2.8 mmol) of DCC, dissolved in 10 ml of CH2Cl2, were added dropwise and the reaction mixture was stirred at 0° C. for 1 h and at room temperature overnight. The precipitated dicyclohexylurea was filtered off and the filtrate was washed with 20% citric acid, sat. sol. NaCl and brine, dried over Na2SO4 and evaporated in vacuo to dryness. The crude product was purified by flash column chromatography on 230-400 mesh silica gel, eluting with a mixture of CH2Cl2/MeOH 95:5 containing 0.5% NH4OH (28%), to yield, after trituration with i-Pr2O, 0.85 g of the title compound.

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