The invention discloses compounds of formula I ##STR1## wherein X is oxygen or sulfur, R is hydrogen, chlorine or fluorine, R.sub.1 is fluorine, chlorine, bromine, cyano or methyl, R.sub.2 is halogen, C.sub.1-6 alkyl, C.sub.1-6 alkoxy, C.sub.1-6 alkylcarbonyloxy, C.sub.3-6 cycloalkoxy, C.sub.3-6 alkynyloxy, C.sub.3-6 alkenyloxy, --COOH, --CO--R.sub.3, --CO--NR.sub.4 R.sub.5, --NR.sub.6 R.sub.7, C.sub.2-6 alkenyl, N-pyrrolyl, 2-oxo-3-tetrahydrofuranyl or is C.sub.1-6 alkyl substituted with halogen, COOH, --CO--R.sub.3, --CO--NR.sub.8 R.sub.9, .dbd.N--OH, .dbd.N--C.sub.1-4 alkoxy, --O--CO--R.sub.3 or --O--C.sub.2-3 alkylene-O--; or is C.sub.2-6 alkenyl substituted with halogen, COOH, --CO--R.sub.3, --CO--NR.sub.8 R.sub.9 or C.sub.1-4 alkoxy; or is C.sub.1-6 alkoxy substituted with cyano, --CO--R.sub.3, C.sub.1-4 alkoxy, C.sub.3-6 cycloalkyl, oxiranyl, or C.sub.1-4 alkoxy or halogen; or is C.sub.3-6 alkenyloxy substituted by C.sub.2-5 alkynyl; R.sub.3 is C.sub.1-6 alkyl, C.sub.1-6 haloalkyl, C.sub.1-6 cyanoalkyl, C.sub.1-6 alkoxy, C.sub.3-6 cycloalkoxy, C.sub.3-6 alkenyloxy, C.sub.3-6 alkynyloxy or C.sub.1-6 alkoxy substituted with cyano, halogen, C.sub.1-6 alkoxy, C.sub.1-6 alkoxycarbonyl, C.sub.3-6 alkynyloxycarbonyl or C.sub.1-4 alkoxy-C.sub.1-4 alkoxycarbonyl; the use of such compounds for the control of phytopathogens, compositions for facilitating such use, and the preparation of the compounds of formula I.
A compound of the formula (Ia): ##STR1## or its salts, in which the variables are as described in the disclosure; herbicidal compositions of said compounds, herbicidal processes using said compounds, defoliant processes using said compounds, and processes for preparing said compounds.
The present invention relates generally to novel hydantoin derivative compounds, pharmaceutical compositions containing such compounds, and methods for their use in preventing and/or treating neurological disorders, including physically damaged nerves and neurodegenerative diseases; for treating alopecia and promoting hair growth; for treating vision disorders and/or improving vision; for treating memory impairment and/or enhancing memory performance; and for treating sensorineural hearing loss by administering such compounds.