Abstract:
PURPOSE: Provided is a process for manufacturing (R)-aryloxypropionic acid ester derivatives using substituted phenol derivative and (S)-alkyl O-arylsulfonyl lactate. CONSTITUTION: A process for manufacturing (R)-aryloxypropionic acid ester derivatives of the formula(1) is characterized by reacting a phenol derivative of the formula(2) and (S)-alkyl O-arylsulfonyl lactate of the formula(3) in the presence of alkali metal carbonate, using aliphatic or aromatic hydrocarbon at 60-100 deg.C.
Abstract:
PURPOSE: 2-phenyl alkanoic acid are prepared from 5,6-dihydro-2(4H)-benzofuranone in the presence of organic acid metal salt catalyst. CONSTITUTION: 5,6-Dihydro-2(4H)-benzofuranone of formula 2(R1 is H, C1-C6 alkyl, phenyl, benzoyl, phenoxy, furoyl or thenoyl; R2 is H, C1-C6 alkyl or phenyl; R3 is H, C1-C6 alkyl, phenyl, pyridyl, naphthyl or thiophenyl group) is reacted at 150-250°C in the presence of 0.01-5 equivalent weight of organic metal salt such as R-CO2M(R is H, C1-C13 alkyl, C1-C13 alkene, C1-C13 alkyne, C1-C13 alkoxyalkyl, C3-C6 cycloalkyl or A-(CH2)n; A is aryl group such as phenyl, naphthyl, pyridyl, quinolyl and thiophenyl group; n= 0-4; Mis alkali metal atom or under the structure) to give 2-phenyl alkanoic acid of formula 1.
Abstract:
본 발명은 o- (클로로메틸)벤조산 에스테르 유도체의 제조방법에 관한 것으로서, 더욱 상세하게는 o- (클로로메틸)벤조산 클로라이드를 출발물질로 하고 알콜화합물을 반응물질 및 반응용매로 사용하여 보다 간편한 조작과 온화한 조건하에서 에스테르화 반응시키므로써 작물보호제를 합성하는 중요한 중간체 화합물인 다음 화학식 1로 표시되는 o- (클로로메틸)벤조산 에스테르 유도체를 제조하는 새로운 방법에 관한 것이다.
상기 화학식 1에서: R 1 은 수소원자, 할로겐원자, C 1 ∼ C 6 의 알킬기, C 1 ∼ C 6 의 할로알킬기, C 1 ∼ C 6 의 알콕시기, C 1 ∼ C 6 의 알콕시카르보닐기, 니트로기 또는 페닐기를 나타내고; R 2 는 C 1 ∼ C 6 의 알킬기, C 1 ∼ C 6 의 할로알킬기 또는 C 3 ∼ C 6 의 사이클로알킬기를 나타낸다.
Abstract:
The sulfonylurea derivatives having an erythro stereoisomer for substituents is described in the following structure of formula (I), wherein P and Q are the same or different, and are each CH or N, the aromatic ring having P and Q is benzene and pyridine ring, R is H or Ra-CO-, Ra-Xa-CO-, wherein Ra is C1-C4 alkyl, C1-C3 haloalkyl, C2-C4 alkenyl or C2-C4 alkinyl, Xa is oxygen or sulfur, NH is NRa, R' is H or CH3, X and Y are independently C1-C2 alkyl, C1-C2 -alkoxy, C1-C2 -haloalkoxy or halogen.
Abstract:
Thiophene sulfonylurea derivs. of formula (I) are new. In the formula (I), R1=H, C1-3 alkyl, C1-3 haloalkyl, halogen, CN, C1-3 alkoxy, C1-3 haloalkoxy, NH2, NHCH3, N(Me)2, C1-2 alkyl substd. by C1-2 alkoxy, C1-2 haloalkoxy, SH, SCH3, CN or OH; R3=H or CH3; W=O or S; P= a gp. of formula (II), (III) or (IV). Pref. the cpds. (I) are methyltriazine-2-yl)amino carbonyl)-4-thiophene sulfonamide, aminocarbonyl)-3-(2-fluoromethyl-1,3-dioxyalane-2-yl)-4thiophene sulfonamide, etc. The cpds. (I) have a herbicidal activity.
Abstract:
PURPOSE: An industrial method for preparing [5-{(2,6-difluorobenzyloxy)methyl}-4,5-dihydro-5-methyl-3-(3-methylthiophene-2-yl)-isoxazole](methiozolin) is provided to obtain a large amount of the methiozolin of high purity and to cultivate agricultural crops. CONSTITUTION: A method for preparing thiozolin(chemical formula 1) comprises: a step of reacting 4,5-dihydro-5-methyl-3-{(3-methylthiophene-2-yl)-isoxazole-5-yl}methanol of chemical formula 2 with 2,6-difluorobenzyl(chloride or bromide) of chemical formula 3 using an alkali metal base and a phase converting catalyst in a mixture of water and organic solvent at 50-100 Deg. C. to prepare the concentrate of an organic layer; and a step of crystallizing the concentrate in a mixture solvent of water/ethanol, water/isopropanol, or C1-C3 alcohol/n-heptane. The organic solvent is benzene, toluene, xylene, chlorobenzene, or 1,2-dichloroethane. The alkali metal base is sodium hydroxide, potassium hydroxide, or lithium hydroxide.
Abstract:
PURPOSE: A nematocidal composition containing N-3,4-dichlorophenyl-1-pyrrolidine carboxamide is provided to ensure strong nematocidal effect. CONSTITUTION: A nematocidal composition contains N-3,4-dichlorophenyl-1-pyrolidine carboxamide compound or pharmaceutically acceptable salt thereof as an active ingredient. The composition has nematocidal effect to Bursaphelenchus xylophilus.
Abstract:
PURPOSE: A nematocide composition containing N-3,4-dichlorophenyl carbamic acid alkyl ester is provided to ensure strong nematicidal effect. CONSTITUTION: A nematocide composition contains N-3,4-dichlorophenyl carbamic acid alkyl ester compound of chemical formula 1 or pharmaceutically acceptable salt as an active ingredient. The composition has nematocidal effect against Bursaphelenchus xylophilus.