摘要:
An oxazolidinedione compound represented by the formula (I): wherein R 1 represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a cycloalkyl group having 3 to 5 carbon atoms, an alkenyl group having 3 to 5 carbon atoms, an alkynyl group having 3 to 5 carbon atoms or an alkoxycarbonyl group having 1 or 2 carbon atoms in the alkyl moiety thereof, R 2 represents an alkyl group having 3 to 5 carbon atoms or a cycloalkyl group having 3 to 5 carbon atoms, and X represents a chlorine atom or a fluorine atom; a process for preparing the same; and a herbicidal composition comprising the oxazolidinedione compound as an active component are disclosed. The above oxazolidinedione compounds exhibit a high selectivity for useful crop plants and a strong herbicidal activity with respect to various noxious weeds.
摘要:
A benzoxazinone compound represented by the formula (I): wherein R¹ represents a hydrogen atom or an alkyl group, and R² represents a hydrogen atom, an alkyl group, a cyanoalkyl group, an alkenyl group, an alkynyl group or an aralkyl group; a process for preparing the same; and a herbicidal composition comprising the benzoxazinone compound as an active component are disclosed. The above benzoxazinone compounds exhibit a high selectivity for useful crop plants and a strong herbicidal activity with respect to various noxious weeds.
摘要:
Novel hydantoin derivative which is represented by the formula: (wherein X and Y represent a halogen atom, R 1 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group or an alkynyl group, R 2 represents a hydrogen atom, an alkyl group, an alkenyl group or an alkynyl group, and R 3 and R 4 independently represent a hydrogen atom or a lower alkyl group), and a herbicide containing said derivative as effective ingredient. This hydantoin derivative exhibit excellent weed-killing activity for harmful weeds and low phytotoxicity for crop plants.
摘要:
A novel liquid crystal compound having an intermediate group of a cis-1,4-substituted 2-butenyl group, low viscosity and a broad mesomorphic temperature range is provided, which compound is expressed by the following formula:
wherein R 1 represents an alkyl group of 1 to 10 carbon atoms; n represents 1 or 2, X represents a hydrogen atom, an alkyl group, a halogen atom, a cyano group, an alkoxy group, a methyl group substituted by 1 to 3 halogen atom(s) or a trihaloalkoxy group, Y and Y' each independently represents a hydrogen atom, a halogen atom.
摘要:
A liquid crystalline compound having a high elastic constant ratio (K33/K11) and an immproved solubility thereof in other liquid crystal materials, have the formula:- (1) :
wherein Q represents -CF₃, -CF₂H or -CFH₂; A₁, A₂ and A₃ each independently represent a trans-1,4-cyclohexylene group, a 1,4-phenylene group wherein one or more hydrogen atoms on the ring may be replaced by F, Cℓ or CN, a pyridine-2,5-diyl group or a 1,3-pyrimidine-2,5-diyl group; ring B represents a 1,4-phenylene group or a trans-1,4-cyclohexylene group which can be replaced at its lateral position by groups L, and L₂ noted below; Z₁, Z₂ and Z₃ each independently represent a covalent bond or a group -CH=CH-, -C=C-, -OCO-, -COO-, -CH₂O-, -OCH₂-, -(CH₂)₂- or -(CH₂)₄-; ℓ and m each independently represent 0 or an integer of 1 to 5; o and p each independently represent 0 or 1; L1 and L2 each independently represent H, F or Cℓ; and L3 represents a hydrogen or halogen atom, -CN, -CF3, -CF2H, -CFH₂, -OCF3, -OCF₂H, a C₁-C₁₀ alkyl group or a C₂-C₁₀ alkenyl group [wherein optional non-adjacent methylene groups (-CH₂-) in the alkyl group or the alkenyl group may each independently be replaced by -O-, -S-, -CO-, -OCO- or -COO-].