| abstract |
Compounds having the structure: WHEREIN R1 and R2, alike or different, are alkyls of 2 to 7 carbon atoms in which there are not more than 3 carbon atoms in a line from the aromatic ring; R3 is an alkyl of 1 to 3 carbon atoms; N IS 0, 1 OR 2; AND X is F, Cl, Br, I, or CN; with the provisos that 1. R1 and R2 are not ortho to each other, 2. AT LEAST ONE OF R1 and R2 contains at least 3 carbon atoms, and 3. X is not ortho to the HAVE BEEN FOUND TO BE SELECTIVE HERBICIDES. |