| 摘要 |
<p>A novel class of compounds which are useful as plant growth regulators is disclosed, having the general structural formula: <CHEM> In which R is C1 to C4 alkyl, alkenyl or alkynyl to which may be attached phenyl, pyridyl, benzoyl, phenoxy, halophenoxy, halobenzoyl, N-phenylcarbamyl, N-alkylcarbamyl, N-trifluoromethylthiadiazolylcarbamyl, carboxy, carbalkoxy or halo substituents, R<1> is H, C1 to C3 alkyl, alkenyl or alkynyl to which may be attached phenyl, halophenyl or phenoxy groups, acetyl, or R and R<1> together may be C2 to C4 alkylene, Ar is phenyl or benozyl, R<2> is C1 to C4 alkyl, alkoxy, alkylene, alkylamino or alkylthio, phenoxy, benzyloxy, carbalkoxy, acetyl, methylenedioxy, trifluoromethyl, nitro, halo or cyano and n may be zero or an integer from 1 to 4, with the provision that at least one position ortho to the point of attachment of a phenyl ring of the Ar structure must be unsubsituted, R<3> is lower alkyl or halo and n min may be zero or an integer from 1 to 4.</p> |
