摘要:
Novel 3-substituted phenyl-2-isoxazoline-5-carboxylic acids or esters thereof. These compounds have excellent properties as plant growth regulators.
摘要:
The present invention relates to novel aromatic alkane derivatives represented by the following general formula (I): ##STR1## wherein Ar stands for a substituted or unsubstituted phenyl or naphthyl group, R.sup.1 stands for a methyl, ethyl or isopropyl group and R.sup.2 stands for a hydrogen atom or a methyl group, or R.sup.1 and R.sup.2 together with the carbon to which they are attached jointly represent a substituted or unsubstituted cycloalkyl group and R.sup.3, stands for a fundamental group of an alcohol which is usually used in a form of R.sup.3 OH as to natural or synthetic pyrethroids, and also to the uses of these compounds.These compounds of the present invention have excellent insecticidal and acaricidal activities while the toxicities of these compounds are very low.
摘要:
Novel diphenyl ether compounds of the general formula: ##STR1## wherein X represents a hydrogen atom or a nitro group, process for preparing the same and diphenyl ethers of the general formula: ##STR2## wherein R represents a hydrogen atom, or substituted or unsubstituted alkyl group, alkenyl group or alkynyl group, and Y represents an oxygen atom, a sulfur atom, or the group ##STR3## wherein R' is defined as R above, by reacting 2-chloro-4-trifluoromethylphenyl-3,4-dinitrophenyl ether with a compound of the general formula:RYH (III)wherein R and Y have the same meanings as defined above, respectively. The latter diphenyl ether compounds of the general formula (II) are useful as herbicides.
摘要:
A 3,4-cis isomer of 4-ethyl-1-(substituted phenyl)-3-substituted phenyl)pyrrolidin-2-one, when reacted with a base, can be effectively convered into a 3,4-trans isomer thereof which has a high herbicidal activity useful as an effective ingredient for a herbicidal composition. Furthermore, 3,4-trans-4-ethyl-1-(substituted phenyl)-3-(substituted phenyl)pyrrolidin-2-one compounds represented by the formula (III) ##STR1## (wherein R.sup.2 is an isopropyl group, and X is a fluorine atom, chlorine atom or bromine atom substituted at the 3-position, or fluorine atoms substituted at the 3- and 4-positions or the 3- and 5-positions) have an extremely excellent activity particularly as a herbicidally active ingredient of the herbicidal composition for rice paddy fields.
摘要:
Novel diphenyl ether hydrazine derivatives, particularly 2-nitro-5 (nucleus-substituted phenoxy) phenylhydrazine derivatives are provided. They are useful as a selective herbicide having a high herbicidal acitivity and residual efficacy.
摘要:
The present invention is directed to a method for preparing 3,4-trans-4-ethyl-1,3-disubstituted (substituted phenyl)pyrrolidine-2-one represented by the formula (1) ##STR1## which comprises the steps of dissolving 4-ethyl-1,3-disubstituted (substituted phenyl)-3-pyrroline-2-one in an inert solvent, and then reducing the same with sodium boron hydride in the presence of methanol.
摘要:
4-Ethyl-3-(phenyl)-1-(3-trifluoromethylphenyl)-2-pyrrolidinones and corresponding compounds bearing a p-substituent on the 1-position phenyl group and/or a substituent on the 3-position phenyl group exhibit selective herbicidal activities against various weeds which cause problems in rice or upland fields, even at extremely low application rates. They can be prepared by reductive dehalogenation of a corresponding .alpha.-haloethyl substituted pyrrolidinone or reductive cyclization of a corresponding N-2-butenyl-N-(substituted phenyl)-haloacetyl-3-trifluoromethylaniline.
摘要:
The present invention relates to novel aromatic alkane derivatives represented by the following general formula (I): ##STR1## wherein Ar stands for a substituted or unsubstituted phenyl or naphtyl group, R.sup.1 stands for a methyl, ethyl or isopropyl group and R.sup.2 stands for a hydrogen atom or a methyl group, or R.sup.1 and R.sup.2 together with the carbon to which they are attached jointly represent a substituted or unsubstituted cycloalkyl group, and R.sup.3 stands for a fundamental group of an alcohol which is usually used in a form of R.sup.3 OH as to natural or synthetic pyrethroids, and also to processes for the preparation of these compounds and the uses of these compounds.These compounds of the present invention have excellent insecticidal and acaricidal activities while the toxicities of these compounds are very low.
摘要:
Novel diphenyl ether compounds of the general formula: ##STR1## wherein X represents a hydrogen atom or a nitro group, process for preparing the same and diphenyl ethers of the general formula: ##STR2## wherein R represents a hydrogen atom, or substituted or unsubstituted alkyl group, alkenyl group or alkynyl group, and Y represents an oxygen atom, a sulfur atom, or the group ##STR3## wherein R' is defined as R above by reacting 2-chloro-4-trifluoromethylphenyl-3,4-dinitrophenyl ether with a compound of the general formula:RYH (III)wherein R and Y have the same meanings as defined above, respectively. The latter diphenyl ether compounds of the general formula (II) are useful as herbicides.
摘要:
1-(3-Substituted benzyl)-3-halogeno-4-(1-halogenoalkyl)-2-pyrrolidinones of the general formula (I): ##STR1## where X represents a hydrogen atom or halogen atom, Y and Z each represents a chlorine atom or bromine atom, and R represents an alkyl group with 2 to 4 carbon atoms, are herbicides useful in rice paddy fields to control weeds therein, especially Echinochloa crusgalli and can be produced subjecting the corresponding 3-dihalogeno compounds to dehalogenation to remove one of the halogen atoms or by cyclizing a 2,2-dihalogenoacetamide derivative represented by the general formula (II) under the presence of an appropriate catalyst; ##STR2## in which X, Y, Z and R respectively have the same meanings as described above.