| 摘要 |
<p>1337269 Hydantoin derivatives ESSO RESEARCH & ENG CO 20 Nov 1970 [5 Jan 1970] 55342/70 Headings C2P and C2C Novel compounds of Formula I where R 1 is C 1-4 alkyl optionally substituted by halogen or alkoxy, C 2-4 alkenyl, C 3-6 cycloalkyl, phenyl or benzyl optionally substituted by one or more halogen atoms, C 2-5 alkylcarbonyl or C 3-6 alkoxycarbonylalkyl, R 2 and R 3 are hydrogen, C 1-4 alkyl or phenyl, or R 2 and R 1 together form a tri- or tetra-methylene bridge, R 4 and R 5 are C 1-4 alkoxy or alkylthio and X is oxygen or sulphur, with the proviso that when R 1 is methyl or alkylcarbonyl, R 4 and R 5 may not both represent simultaneously methoxy or ethoxy, may be prepared by reacting a compound of Formula II with a compound of Formula III where Hal is halogen and M<SP>+n</SP> is an n-valent cation. The starting materials of Formula II may be prepared by reacting a corresponding 1- substituted or 1,5-disubstituted hydantoin with formaldehyde to form a 3-hydroxymethyl hydantoin derivative and reacting this compound with a halogenating agent. The compounds of Formula I have insecticidal and acaricidal properties and may be used as the active ingredients in conventional pesticidal compositions.</p> |
