Methyl Acrylate → Methyl (2E)-3-(3-fluoro-2-((((2-methoxy-5-(trifluoromethyl)phenyl)amino)carbonyl)amino)phenyl)-2-propenoate

Participants

Reaction Steps

In addition, it has surprisingly been found that the structural unit methyl {8-fluoro-3-[2-methoxy-5-(trifluoromethyl)phenyl]-2-oxo-1,2,3,4-tetrahydroquinazolin-4-yl}acetate can be synthesized efficiently by means of an ortho-palladization. Here, N-(2-fluorophenyl)-N′-[2-methoxy-5-(trifluoromethyl)phenyl]urea is reacted with methyl acrylate and an oxidizing agent in the presence of an acid to give methyl (2E)-3-{3-fluoro-2-[({[2-methoxy-5-(trifluoromethyl)phenyl]amino}-carbonyl)amino]phenyl}acrylate. The ring closure to the tetrahydroquinazoline then follows under basic reaction conditions.

Provenance & Evidence