Formaldehyde → 2-[(6-Tert-butoxycarbonylamino-pyridin-3-yl)-phenyl-methyl]-acrylic acid ethyl ester

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Reaction Steps

Diethylamine (0.52 mL, 5.04 mmol) was added to a mixture of 2-[(6-tert-butoxycarbonylamino-pyridin-3-yl)-phenyl-methyl]-malonic acid monoethyl ester (1.7 g, 4.1 mmol) and 37% aq. solution of formaldehyde (0.42 mL, 5.6 mmol) in methylene chloride (6.5 mL) at 0° C. The mixture was stirred overnight at room temperature and then diluted with ethyl acetate. The organic layer was washed with aqueous saturated sodium bicarbonate and is brine and dried. After filtration and evaporation in vacuo the crude product was purified by flash chromatography (CH2Cl2) to yield 2-[(6-tert-butoxycarbonylamino-pyridin-3-yl)-phenyl-methyl]-acrylic acid ethyl ester (0.36 g, 23%).

Provenance & Evidence