Synthesis with α-Heterosubstituted Phosphonate Carbanions. 12. X-ray Structure Determination of (R,S)-Diphenyl 1-(4-Bromoanilino)-1-(4,5-methylenedioxy-2-nitrophenyl)methanephosphonate

Article abstract of DOI:10.1021/jo00340a022

The reaction of (R,S)-diphenyl 1-(4-nitroanilino)-1-(2-methoxyphenyl)methanephosphonate with KOH in methanol followed by addition of an aldehyde is expected to yield rapidly in an aldol-type condensation the corresponding enamine.However, transesterificat