Diisopropylethylamine → ethyl 2-{4-[{[2-[2-(2,4-difluorophenyl)ethyl]-4-oxo-1(4H)-quinazolinyl]-acetyl}({4'-[(trifluoromethyl)oxy]-4-biphenylyl}methyl)amino]-1-piperidinyl}-2-methylpropanoate

Participants

Reaction Steps

A mixture of [2-[2-(2,4-difluorophenyl)ethyl]-4-oxo-1(4H)-quinazolinyl]acetic acid (Int. C3) (114 mg, 1.1 equiv), ethyl 2-methyl-2-{4-[({4′-[(trifluoromethyl)oxy]-4-biphenylyl}methyl)amino]-1-piperidinyl}propanoate (Int. B3) (139 mg, 1 equiv), DMF (1.2 ml) and DIPEA (0.16 ml, 3 equiv) was shaken at room temperature, then HATU (176 mg, 1.5 equiv) was added with vigorous agitation and shaking continued for 30 min. A further portion of Intermediate D5 (21 mg, 0.2 equiv) was added, followed 1 h later by further HATU (23 mg, 0.2 equiv), then shaking was continued for 18 h. Reverse phase HPLC (Preparative Method B) gave ethyl 2-{4-[{[2-[2-(2,4-difluorophenyl)ethyl]-4-oxo-1(4H)-quinazolinyl]acetyl}({4′-[(trifluoromethyl)oxy]-4-biphenylyl}methyl)amino]-1-piperidinyl}-2-methylpropanoate as a white solid (149 mg).

Provenance & Evidence