Trichloroacetyl isocyanate → HCID 86588152, compound

Participants

Reaction Steps

The tert-butyl (E)-3-{7-fluoro-2-(3-hydroxypiperidino)-8-[2-(4-isopropyl-1,3-thiazol-2-yl)ethyl]-4-oxo-4H-pyrido[1,2-a]pyrimidin-3-yl}-2-propenoate (48.0 mg, 0.0885 mmol) obtained in Example 156, (M) was dissolved in ethyl acetate (3 ml), added with trichloroacetyl isocyanate (0.052 ml, 0.442 mmol) and stirred at room temperature for 1 hour. The reaction mixture was added with methanol:chloroform (1:10, 10 ml) and concentrated, and the resulting residue was dissolved in a mixed solvent of methanol (3 ml) and distilled water (1 ml), added with sodium formate (12.0 mg, 0.177 mmol) and stirred overnight at room temperature. The solution was further added with sodium formate (12.0 mg, 0.177 mmol), stirred for 5 hours and then concentrated, and the resulting residue was purified by preparative TLC (chloroform:methanol=100:5) to obtain the title compound (71.3 mg, quantitative) as lyophilized product.

Provenance & Evidence