Molecules p. 163 - 172 (2007)
Update date:2022-08-17
Topics:
Li, Caihong
Song, Baoan
Yan, Kai
Xu, Gangfang
Hu, Deyu
Yang, Song
Jin, Linhong
Xue, Wei
Lu, Ping
New α-aminophosphonates were synthesized by the Kabachnik-Fields reaction of 3,4,5-trimethoxybenzaldehyde (TMB) with p- or m-bromoaniline and a dialkyl phosphite under solvent-free conditions. TMB was prepared from gallic acid via a four step synthetic sequence involving etherification, esterification, hydrazidation and potassium ferricyanide oxidation. The structures of all synthesized compounds were confirmed by elemental analysis, IR, 1H-, 13C- and 31P-NMR spectral data. Compound 7g was also characterized by X-ray crystallography. A half-leaf method was used to determine the in vivo curative efficacy of the eight title products against tobacco mosaic virus (TMV). It was found that compounds 7g and 7h possess good in vivo curative effects against TMV.
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