Methyl (2E)-3-{3-fluoro-2-[(triphenylphosphoranylidene)amino]phenyl}propenoate → Methyl (2E)-3-{3-fluoro-2-[({[2-methoxy-5-(trifluoromethyl)phenyl]imino}methylene)amino]-phenyl}-2-propenoate

Participants

Reaction Steps

5.0 g (10.98 mmol) of methyl (2E)-3-{3-fluoro-2-[(triphenylphosphoranylidene)amino]phenyl}-2-propenoate (Example 10A) are initially charged in 50 ml of dichloromethane, and the mixture is stirred with 2.5 g (11.53 mmol) of 2-isocyanato-1-methoxy-4-(trifluoromethyl)benzene (Example 17A) at room temperature overnight. The solvent is removed by distillation and the product is then purified by chromatography on silica gel (isohexane/dichloromethane 2:1; 1:1) and recrystallized from isohexane.

Provenance & Evidence