摘要:
A transition metal compound represented by the general formula (2) or (3) described below, a catalyst component for olefin polymerization comprising said transition metal compound, a catalyst component for olefin polymerization using said transition metal compound and (C) and/or (D) described below, and a process for producing an olefinic polymer wherein olefins are homopolymerized or olefins are copolymerized with other olefins and/or other polymerizable unsaturated compound using said catalyst for olefin polymerization. (C); A specific aluminum compound (D); A specific boron compound.
摘要:
A transition metal compound represented by the general formula (2) or (3) described below, a catalyst component for olefin polymerization comprising said transition metal compound, a catalyst component for olefin polymerization using said transition metal compound and (C) and/or (D) described below, and a process for producing an olefinic polymer wherein olefins are homopolymerized or olefins are copolymerized with other olefins and/or other polymerizable unsaturated compound using said catalyst for olefin polymerization. (C); A specific aluminum compound. (D); A specific boron compound.
摘要:
A process for preparing a dimer of a lower .alpha.-olefin in the presence of Catalyst (A) containing a nickel compound, a trialkylaluminum, a halogenated phenol, a phosphorus compound and a sulfur compound, Catalyst (B) containing a nickel compound, a trialkylaluminum, a fluorinated isopropyl alcohol, a phosphorus compound, a sulfonic acid and water, or Catalyst (C) containing a nickel compound, a trialkylaluminum, a halogenated phenol, a phosphorus compound, a sulfonic acid and water, by which method, the dimer of the lower .alpha.-olefin is prepared in a high yield and high selectivity.
摘要:
A method for producing an optically active cyclopropanecarboxylate compound represented by the formula (5): wherein R6, R7, R8 and R9 represent a C1-C6 alkyl group or the like and R10 represents a C1-C6 alkyl group, which comprises reacting an olefin represented by the formula (3): wherein R6, R7, R8 and R9 are as described above, with a diazoacetic acid ester represented by the formula (4): N2CHCO2R10 (4) wherein R10 is as described above, in the presence of an asymmetric copper complex obtained by mixing (A) at least one monovalent or divalent copper compound, (B) at least one optically active bisoxazoline compound represented by the formula (1): wherein R1 and R2 represent a C1-C6 alkyl group or the like; R3 represents a tert-butyl group or the like; and R4 and R5 are the same and represent C1-C3 alkyl groups or the like, and (C) at least one fluorine compound represented by the formula (2): A-MF6 (2) wherein A represents a trityl group or the like, and M represents a phosphorous atom or the like.
摘要:
A process for production of a trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester comprising: (A) a step of obtaining a mixture containing a trans-2,2-dimethyl-3-(hydroxymethyl)cyclopropanecarboxylic acid ester, (B) a step of conducting an oxidation treatment of the mixture obtained in the step (A) to obtain a mixture containing a crude trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester, (C) a step of contacting the mixture obtained in the step (B) with an aqueous alkali metal hydrogen sulfite solution to obtain an alkali metal salt of a trans-2,2-dimethyl-3-[(hydroxy)(sulfo)methyl]cyclopropanecarboxylic acid ester, and (D) a step of contacting the alkali metal salt obtained in the above-mentioned step (C) with a base or the like to obtain a trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester.
摘要:
It is provided that a method for producing an optically active bisamidoalcohol compound represented by the formula (3): wherein R1 represents a C1-6 alkyl group, an optionally substituted phenyl group, an optionally substituted aralkyl group or a hydrogen atom, or two R1s, which are bonded to the same carbon atom, are bonded to form a ring together with the carbon atom to which they are bonded, R2 represents a C1-6 alkyl group, an optionally substituted phenyl group, a 1-naphthyl group, a 2-naphthyl group or an optionally substituted aralkyl group, R3 and R4 are the same or different, and each represents a hydrogen atom or C1-3 alkyl group, m represents an integer of 0 to 2, and * represents an asymmetric center, which comprises reacting an optically active aminoalcohol compound represented by the formula (1): wherein R1, R2 and * are as defined above, with a diester compound represented by the formula (2): wherein R3, R4 and m are as defined above and R5 represents a C1-3 alkyl group, in the presence of a lithium compound.
摘要:
A process for production of an optically active cyclopropanecarboxylate compound represented by the formula (5): wherein R6, R7, R8 and R9 represent a C1-C6 alkyl group or the like and R10 represents a C1-C6 alkyl group, which comprises reacting an olefin represented by the formula (3): wherein R6, R7, R8 and R9 are as described above, with a diazoacetic acid ester represented by the formula (4): N2CHCO2R10 (4) wherein R10 is as described above, in the presence of an asymmetric copper complex obtained by mixing (A) at least one monovalent or divalent copper compound, (B) at least one optically active bisoxazoline compound represented by the formula (1): wherein R1 and R2 represent a C1-C6 alkyl group or the like; R3 represents a tert-butyl group or the like; and R4 and R5 are the same and represent C1-C3 alkyl groups or the like, and (C) at least one boron compound represented by the formula (2): wherein A represents a trityl group or the like, X represents a fluorine atom or the like, and n represents an integer of 1 to 5.
摘要:
An optical disc apparatus and method for recording and reproducing information to/from an optical disc, including discrimination of the optical disc, reading control information in an un-recordable area formed in an inner periphery of the optical disc, conducting focus control based on a focus error signal in a recordable area formed outside of the un-recordable area, and determining an optimum offset value of the focus error signal in the recordable area. Further, adjustment in amplitude of a reproduced signal from an inner periphery of the recordable area is conducted, test-writing in the inner periphery of the recordable area is conducted, test-writing in an outer periphery of the recordable area is conducted, and adjustment in amplitude of a reproduced signal from the outer periphery of the recordable area is conducted. The respective operations are conducted sequentially so as to make the optical disc in a reproducible and recordable condition.
摘要:
There is disclosed a method for producing 2,3-dimethylbutene-1 and 2,3-dimethylbutene-2, which is characterized by the steps of (a) dimerizing propylene in a propylene-dimerization step using a nickel complex catalyst as described below as a propylene-dimerization catalyst having propylene-dimerization activity and DMB-1 selectivity, (b) rectifying the resulting reaction solution to obtain 2,3-dimethylbutene-1 as a distillate and a distillation residue containing 2,3-dimethylbutene-1 in a 2,3-dimethylbutene-1 distillation step, (c) allowing the distillation residue to contact with sulfuric acid, sulfonic acid or hetetopolyacid to isomerize 2,3-dimethylbutene-1 in said distillation residue into 2,3-dimethylbutene-2 in an isomerization step, and (d) rectifying the resulting isomerization reaction solution to obtain 2,3-dimethylbutene-2 in a 2,3-dimethylbutene-2 distillation step, wherein said nickel complex catalyst containing (A) at least one nickel compound and the like, (B) a trialkylaluminum, (C) a trivalent phosphorus compound, (D) a fluorinated isopropanol or a halogenated phenol (E) at least one sulfur compound selected from a sulfonic acid and a dialkylsulfuric acid.
摘要:
A diepoxy compound represented by the formula (1) wherein R1, R2, R3 and R4 independently each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.