摘要:
The present invention relates to a novel method for producing cyclopentenolone of the formula (I), ##STR1## which is a useful intermediate for producing agricultural chemicals, which comprises reacting an acetonedicarboxylic ester of the formula (VII), ##STR2## wherein R is a C.sub.1 -C.sub.6 alkyl group, with 2-propynyl chloride in the presence of magnesium alkoxide and in the presence of alkali iodide to obtain novel mono-(2-propynyl)-substituted acetonedicarboxylic ester of the formula (VI), ##STR3## wherein R is as defined above; hydrolyzing the mono-(2-propynyl)-substituted acetonedicarboxylic ester of the formula (VI) under alkaline conditions with an alkali and then reacting the hydrolyzed product with methylglyoxal of the formula, ##STR4## to obtain novel .gamma.-diketone of the formula (V), ##STR5## and ring-closing the .gamma.-diketone of the formula (V) under alkaline condition.
摘要:
A new cyclopropanecarboxylic acid ester represented by the formula, ##SPC1##Wherein R.sub.1 is alkyl having up to four carbon atoms, alkenyl having up to five carbon atoms, cycloalkenyl having up to six carbon atoms, alkenyl having up to five carbon atoms, benzyl, phenoxy or halogen; R.sub.2 and R.sub.3 are hydrogen, halogen or methyl; and any adjacent two of R.sub.1, R.sub.2 and R.sub.3 may combine to form polymethylene, which is useful as insecticides and acaricides having a strong insecticidal activity but a low toxicity to mammals, in agriculture, horticulture as well as public health.
摘要:
A new pyrethroidal pesticide containing as an active ingredient a pesticidally effective amount of novel cyclopropanecarboxylic acid esters represented by the formula, ##EQU1## wherein R is a hydrogen atom, a halogen atom, a methyl or a methoxy group, and R.sub.1 and R.sub.2 are hydrogen atom, methyl group or a halogen atom, which have a low toxicity to mammals, excellent pesticidal effect on injurious pests in cereal storage, agriculture and forestry and a wide range of uses for prevention of epidemics.
摘要:
A cyclopropanecarboxylic acid ester of the formula (I), ##STR1## wherein R.sub.1 is a hydrogen atom, methyl group or a fluorine, chlorine or bromine atom, R.sub.2 is a fluorine, chlorine or bromine atom, and each of R.sub.3 and R.sub.4 is independently a hydrogen atom, a C.sub.1 -C.sub.3 alkyl, C.sub.2 -C.sub.3 alkenyl or C.sub.2 -C.sub.3 alkynyl group, an alkyl- or halogen-substituted aryl, unsubstituted aryl group or an aralkyl group, which possesses various useful insecticidal and acaricidal activities and can be prepared by reacting an alcohol, halide or arylsulfonate compound of the formula (II), ##STR2## wherein R.sub.3 and R.sub.4 have the same meanings as defined above and A is a hydroxyl group, a halogen atom or an arylsulfoxy group, with a cyclopropanecarboxylic acid of the formula (III), ##STR3## wherein R.sub.1 and R.sub.2 have the same meanings as defined above, or its reactive derivative.
摘要:
The present invention relates to an optically active borane complex represented by the general formula, ##STR1## wherein R.sup.1 represents an aryl group, R.sup.2 represents an alkyl group and a mark * means an asymmetric carbon, and a method for producing optically active alcohol derivatives by the reduction of prochiral ketones with said borane complex. The optically active alcohol derivative is useful for fungicides, herbicides or plant growth regulators.
摘要:
A novel substituted-arylacetic acid ester of the formula, ##STR1## wherein R.sub.1 and R.sub.2 are each hydrogen or a halogen atom, a C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 alkenyl, C.sub.1 -C.sub.4 alkoxy, cyano, nitro, methylthio, C.sub.1 -C.sub.4 alkanoyl, C.sub.1 -C.sub.4 alkanoyloxy, or C.sub.1 -C.sub.4 alkoxycarbonyl group, or R.sub.1 and R.sub.2, taken together, may form methylenedioxy, a C.sub.3 -C.sub.5 alkylene or butadienylene (--CH.dbd.CH--CH.dbd.CH--) ring; R.sub.3 is a C.sub.2 -C.sub.4 alkyl, C.sub.2 -C.sub.4 alkenyl, propargyl, C.sub.3 -C.sub.6 cycloalkyl or cyclopropylmethyl group; R.sub.4 is hydrogen or a halogen atom, methyl or ethyl group; R.sub.5 is allyl, propargyl, 3-butenyl, 3-butynyl, phenyl or benzyl group; and A is oxygen or sulfur atom or --CH.dbd.CH-- group, which possesses various useful insecticidal and acaricidal activities and can be prepared by reacting a substituted-arylacetic acid of the formula: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and A are each as defined above, or a reactive derivative thereof with an alcohol, or halide or sulfonate thereof of the formula, ##STR3## wherein R.sub.4 and R.sub.5 are each as defined above and X is hydroxy group, a halogen atom, alkylsulfonyloxy or arylsulfonyloxy group.
摘要:
A novel substituted-arylacetic acid ester of the formula, ##STR1## wherein R.sub.1 and R.sub.2 are each hydrogen or a halogen atom, a C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 alkenyl, C.sub.1 -C.sub.4 alkoxy, cyano, nitro, methylthio, C.sub.1 -C.sub.4 alkanoyl, C.sub.1 -C.sub.4 alkanoyloxy, or C.sub.1 -C.sub.4 alkoxycarbonyl group, or R.sub.1 and R.sub.2, taken together, may form methylenedioxy, a C.sub.3 -C.sub.5 alkylene or butadienylene (--CH.dbd.CH--CH.dbd.CH--) ring; R.sub.3 is a C.sub.2 -C.sub.4 alkyl, C.sub.2 -C.sub.4 alkenyl, propargyl, C.sub.3 -C.sub.6 cycloalkyl or cyclopropylmethyl group; R.sub.4 is hydrogen or a halogen atom, methyl or ethyl group; R.sub.5 is allyl, propargyl, 3-butenyl, 3-butynyl, phenyl or benzyl group; and A is oxygen or sulfur atom or --CH.dbd.CH-- group, which possesses various useful insecticidal and acaricidal activities and can be prepared by reacting a substituted-arylacetic acid of the formula; ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and A are each as defined above, or a reactive derivative thereof with an alcohol, or halide or sulfonate thereof of the formula, ##STR3## wherein R.sub.4 and R.sub.5 are each as defined above and X is hydroxy group, a halogen atom, alkylsulfonyloxy or arylsulfonyloxy group.
摘要:
Disclosed are optically active secondary amine compounds and salts thereof having the general formula (I): ##STR1## a process for the preparation of the optically active secondary amine compounds and salts thereof, and the use of such compounds. Such compounds exhibit a high resolution power and hence are useful agents for optical resolution.
摘要:
A novel cyclopropanecarboxylic acid ester of the formula, ##SPC1##Wherein R.sub.1 is a hydrogen atom, a cyano or ethynyl group, and X is a chlorine, bromine or fluorine atom, which possesses various useful insecticidal and acaricidal activities and can be prepared by reacting a compound of the formula, ##SPC2##Wherein R.sub.1 is as defined above and R.sub.2 is hydroxyl, a halogen atom or an arylsulfoxy group, with a cyclopropanecarboxylic acid of the formula, ##EQU1## wherein X is as defined above, or its reactive derivative.
摘要:
The present invention relates to an optically active borane complex represented by the general formula, ##STR1## wherein R.sup.1 represents an aryl group, R.sup.2 represents an alkyl group and a mark * means an asymmetric carbon, and a method for producing optically active alcohol derivatives by the reduction of prochiral ketones with said borane complex. The optically active alcohol derivative is useful for fungicides, herbicides or plant growth regulators.