| abstract |
NEW MATERIAL:A β-oxy-α-methylenepropionic acid shown by the formula I (A is benzene nucleus-containing group such as fluorophenyl, methylthiophenyl, naphthylaminophenyl, or biphenyl, or tetrahydronaphthyl). n EXAMPLE: 2-Methylene-3-(4-fluorophenoxy)propionic acid. n USE: Useful as a herbicide or plant growth regulator. Excellent for controlling the growth of plant. n PREPARATION: A phenol shown by the formula II is reacted with β, β-dibromoisobutyric acid in a solvent such as ethanol, etc. in the presence of preferably three times the molar amount of NaOH, to give a compound shown by the formula I . n COPYRIGHT: (C)1984,JPO&Japio |