Abstract: 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.

Abstract: The present invention relates to 2-arylethyl ether or thioether derivatives represented by the following general formula [I]: ##STR1## wherein Ar stands for an aryl group, R.sup.1 stands for straight or branched chain alkyl group of 1 to 6 carbons, R.sup.2 stands for a hydrogen atom, or a methyl or ethyl group, R.sup.3 stands for a halogen atom, or a methyl or methoxyl group, R.sup.4 stands for a hydrogen or halogen atom, or a lower alkyl or lower alkoxy group, and n is an integer of 1 or 2 with the proviso that when n is 2, the groups R.sup.4 may be the same or different, and Y stands for an oxygen or sulfur atom, and also to processes for the preparation of these ethers or thioethers and a use of these ethers or thioethers.These compounds of the present invention have excellent insecticidal and acaricidal activities while the toxicity of these compounds are very low.

Abstract: 2-Arylpropyl ether or thioether derivatives represented by the following general formula [I]: ##STR1## wherein Ar stands for an aryl group, R stands for a methyl or ethyl group, Y stands for an oxygen or sulfur atom, and B stands for a group represented by the following formula [II]: ##STR2## or the following general formula [III]: ##STR3## wherein Z stands for an oxygen or sulfur atom or a carbonyl or methylene group, R.sup.1 stands for a hydrogen or halogen atom or a lower alkyl group or a lower alkoxy group, and n is an integer of from 1 to 5 with the proviso that when n is 2 or more, the groups R.sup.1 may be the same or different,are produced by reacting a compound represented by the following formula (V): ##STR4## with a compound represented by the following formula (VI):B--CH.sub.2 --D (VI)wherein Ar, R and B are defined above, A is a halogen atom and D is Y--H in which Y is as defined above,in the presence of a base in dimethylsulfoxide or sulfolane.

Abstract: A 2-fluoroethoxy-substituted benzene derivative represented by the general formula ##STR1## wherein X represents an oxygen or sulfur atom, R.sup.1 and R.sup.2 represent a hydrogen atom or a lower alkyl group, n represents 0 or 1, and A represents a group of the general formula ##STR2## in which R.sup.3 and R.sup.4 represent a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a lower haloalkyl group, a lower haloalkylthio group or a methylenedioxy group, R.sup.5 and R.sup.6 represent a hydrogen atom or a lower alkyl group, and p and m represent 0 or 1.This compound is useful as an active ingredient of insecticidal and acaricidal agents, and can be produced by reacting a compound of the general formula ##STR3## with a compound of the general formulaA--D (IV)wherein in general formulae (III) and (IV), A, R.sup.1, R.sup.

Abstract: Indene compounds of the formula ##STR1## wherein X represents a hydrogen atom, a halogen atom, a hydroxyl group or a methyl group, and y is 0 or an integer of 1 to 3, are produced by either heat-decomposing indene compounds of the formula ##STR2## wherein X and y are as defined, in the presence of an acid or alkaline catalyst; or heat-decomposing isopropenyl phenols of the formula ##STR3## wherein X and y are as defined, or oligomers or polymers thereof in the presence of an acid catalyst. 5-Hydroxy-1,1,3-trimethyl-2-indene corresponding to formula (III) is a novel compound.

Abstract: The present invention relates to 2-arylpropyl ether or thioether derivatives represented by the following general formula [I]: ##STR1## wherein Ar stands for an aryl group, R stands for a methyl or ethyl group, Y stands for an oxygen or sulfur atom, and B stands for a group represented by the following formula [II]: ##STR2## or the following general formula [III]: ##STR3## wherein Z stands for an oxygen or sulfur atom or a carbonyl or methylene group, R.sup.1 stands for a hydrogen or halogen atom or a lower alkyl group or a lower alkoxy group, and n is an integer of from 1 to 5 with the proviso that when n is 2 or more, the groups R.sup.1 may be the same or different, and also to processes for the preparation or these ethers of thioethers and a use of these ethers or thioethers.These compounds of the present invention have excellent insecticidal and acaricidal activities while the toxicity of these compounds are very low.

Abstract: Indene compounds of the formula ##STR1## wherein X represents a hydrogen atom, a halogen atom, a hydroxyl group or a methyl group, andy is 0 or an integer of 1 to 3,are produced by either heat-decomposing indene compounds of the formula ##STR2## wherein X and y are as defined, in the presence of an acid or alkaline catalyst; or heat-decomposing isopropenyl phenols of the formula ##STR3## wherein X and y are as defined,or oligomers or polymers thereof in the presence of an acid catalyst. 5-Hydroxy-1,1,3-trimethyl-2-indene corresponding to formula (III) is a novel compound.

Abstract: A process for preparing piperonal which comprises the steps of reacting 1,2-methylenedioxybenzene with an N-alkylformanilide and a condensing agent comprising one or more compounds selected from the group consisting of phosgene, phosphorus oxychloride, phosphorus oxybromide, thionyl chloride, thionyl bromide, sulfuryl chloride, sulfuryl bromide, phosphorus trichloride, and phosphorus pentachloride, and then hydrolyzing the resulting reaction product.

Abstract: Diphenols, alkyl ethers and aryl ethers of diphenols are produced by subjecting phenols, alkyl ethers and aryl ethers of phenols to oxidation with an organic per-acid in the presence of at least one member selected from the group consisting of acetyl acetone and acetonyl acetone as the catalyst.