2,3-Dichloro-6-fluorobenzaldehyde → 3-Methyl 5-(1-methylethyl) 4-(2,3-dichloro-6-fluorophenyl)-2-(fluoromethyl)-1,4-dihydro-6-methyl-3,5-pyridinedicarboxylate

Beteiligte Stoffe

Reaktionsschritte

2,3-Dichloro-6-fluorobenzaldehyde (1.44 g, 7.5 mmoles), methyl 4-fluoro-3-oxobutanoate (1.0 g, 7.5 mmoles) and 1-methylethyl 3-amino-2-butenoate (1.06 g, 7.5 mmoles) were heated at 90° under nitrogen with stirring for 2.5 hours. The cooled reaction mixture was chromatographed on silica eluting with ethyl acetate/methylene chloride mixtures. The title compound (1.1 g) was obtained by crystallisation from a petroleum ether (60°-80°)/2-propanol mixture mp 129°-31°.

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