摘要:
Esters and lactones can be respectively reduced to alcohols and diols in the presence of the Group 8 (VIII) transition metal complex, base and hydrogen gas (H2). An extremely practical reduction method can be provided by preferable combinations of the Group 8 (VIII) transition metal complex, the base, a used amount of the base, a pressure of hydrogen gas and a reaction temperature. This method is used in place of hydride reduction and is a useful method by which design of highly active catalysts can be relatively easily made while a high productivity can be expected.
摘要:
A disc drive apparatus is adapted to be driven when incorporated into a host appliance provided with a see-through section and comprises a disc receiving section for receiving a disc-shaped recording medium, a disc rotary drive mechanism for driving the disc-shaped recording medium to rotate, a recording and/or reproduction mechanism for recording information signals on and/or reproducing information signals from the disc-shaped recording medium and an apparatus main body arranged in correspondence to the see-through section formed in the host appliance and provided with a see-through hole exposing part of the disc-shaped recording medium placed on the disc receiving section to the outside of the host appliance by way of the see-through section.
摘要:
An optically active 1-(fluoro-, trifluoromethyl- or trifluoromethoxy-substituted phenyl)alkylamine N-monoalkyl derivative represented by the formula 4 is produced by a process including (a) reacting an optically active secondary amine, represented by the formula 1, with an alkylation agent R2—X, in the presence of a base, thereby converting the secondary amine into an optically active tertiary amine represented by the formula 3; and (b) subjecting the tertiary amine to a hydrogenolysis, thereby producing the N-monoalkyl derivative, wherein R represents a fluorine atom, trifluoromethyl group or trifluoromethoxy group, n represents an integer of from 1 to 5, each of R1 and R2 independently represents an alkyl group having a carbon atom number of from 1 to 6, Me represents a methyl group, Ar represents a phenyl group or 1- or 2-naphthyl group, * represents a chiral carbon, and X represents a leaving group.
摘要:
The present invention relates to a process for producing an optically active 1-alkyl-substituted 2,2,2-trifluoroethylamine, which is an important intermediate of medicines and agricultural chemicals, and which is represented by the formula [3] [in the formula R represents a lower alkyl group of a carbon and * represents an asymmetric carbon], or its salt by subjecting an optically active imine represented by the formula [1] to an asymmetric reduction under hydrogen atmosphere using a metal catalyst of Group VIII to convert it into an optically active secondary amine represented by the formula [2] and then by subjecting the secondary amine or its salt to hydrogenolysis. [Chem. 23]
摘要:
A herbicidal composition for upland farming which can control weeds that have been difficult to control, for example, cleavers, chickweed, birdseye speedwell and violet, said composition containing as active ingredients a 3-substituted phenylpyrazole derivative represented by the general formula (I): ##STR1## (wherein R is a hydrogen atom, a C.sub.1-6 alkyl group, a C.sub.3-6 cycloalkyl group, a C.sub.1-6 haloalkyl group, a C.sub.2-6 alkenyl group or a C.sub.2-6 alkynyl group, R.sup.1 is a C.sub.1-6 alkyl group, X.sup.1 and X.sup.2, which may be the same or different, are halogen atoms, and Y is an oxygen atom or a sulfur atom) and at least one compound selected from the group consisting of sulfonylurea derivatives, phenylurea derivatives and phenoxy fatty acid derivatives; and a weeding method using said composition.
摘要:
The present invention discloses phenylimidazole derivatives having herbicidal activities, represented by general formula (I) ##STR1## (R.sup.1 and R.sup.2 each represent an alkyl group or the like; R.sup.3 represents an alkoxy group or the like; X is a hydrogen atom or a halogen atom; and two Ys each represent a halogen atom); processes for producing said derivatives; herbicidal compositions each comprising said derivative as an active ingredient; and a method for weed control, using said herbicidal composition.
摘要:
A pesticidal aqueous suspension concentrate containing as an active ingredient a 3-substituted pyrazole derivative represented by the general formula (I): ##STR1## (wherein the substituents areas defined in the description of the specification)in which the 50% particle size and 90% particle size in cumulative particle size distribution of particles of the active ingredient are less than 1 .mu.m and less than 2 .mu.m, respectively, and which is harmless to useful crops and is equal to an emulsifiable concentrate in herbicidal effect; and a process for producing said pesticidal aqueous suspension concentrate.
摘要:
It was found that a fluoro derivative can be produced by reacting a hydroxy derivative with sulfuryl fluoride (SO2F2) in the presence of an organic base or in the presence of an organic base and “a salt or complex comprising an organic base and hydrogen fluoride”. According to the present production process, it is not necessary to use perfluoroalkanesulfonyl fluoride, which is not preferable in industrial use, and it is possible to advantageously produce optically-active fluoro derivatives, which are important intermediates of medicines, agricultural chemicals and optical materials, specifically 4-fluoroproline derivatives, 2′-deoxy-2′-fluorouridine derivatives, optically-active α-fluorocarboxylate derivatives, and the like, even in a large scale.
摘要翻译:发现氟衍生物可以通过羟基衍生物与硫酰氟(SO 2 F 2)在有机碱的存在下或在有机碱和“含有机碱和氟化氢的盐或络合物”的存在下反应来制备, 。 根据本制造方法,不需要使用在工业上不优选的全氟烷基磺酰氟,可以有利地制造作为药物,农药,光学材料的重要中间体的光学活性氟衍生物, 特别是4-氟脯氨酸衍生物,2'-脱氧-2'-氟尿苷衍生物,光学活性α-氟代羧酸酯衍生物等,甚至大规模。
摘要:
It was found that a fluoro derivative can be produced by reacting a hydroxy derivative with sulfuryl fluoride (SO2F2) in the presence of an organic base or in the presence of an organic base and “a salt or complex comprising an organic base and hydrogen fluoride”. According to the present production process, it is not necessary to use perfluoroalkanesulfonyl fluoride, which is not preferable in industrial use, and it is possible to advantageously produce optically-active fluoro derivatives, which are important intermediates of medicines, agricultural chemicals and optical materials, specifically 4-fluoroproline derivatives, 2′-deoxy-2′-fluorouridine derivatives, optically-active α-fluorocarboxylate derivatives, and the like, even in a large scale.
摘要翻译:发现氟衍生物可以通过羟基衍生物与硫酰氟(SO 2 H 2 F 2)在有机碱的存在下或在有机碱存在下反应来制备 有机碱和“含有机碱和氟化氢的盐或络合物”。 根据本制造方法,不需要使用在工业上不优选的全氟烷基磺酰氟,可以有利地制造作为药物,农药,光学材料的重要中间体的光学活性氟衍生物, 特别是4-氟脯氨酸衍生物,2'-脱氧-2'-氟尿苷衍生物,光学活性α-氟代羧酸酯衍生物等,甚至大规模。
摘要:
An optically active 1-(fluoro-, trifluoromethyl- or trifluoromethoxy-substituted phenyl)alkylamine N-monoalkyl derivative represented by the formula 4 is produced by a process including (a) reacting an optically active secondary amine, represented by the formula 1, with an alkylation agent R2—X, in the presence of a base, thereby converting the secondary amine into an optically active tertiary amine represented by the formula 3; and (b) subjecting the tertiary amine to a hydrogenolysis, thereby producing the N-monoalkyl derivative, wherein R represents a fluorine atom, trifluoromethyl group or trifluoromethoxy group, n represents an integer of from 1 to 5, each of R1 and R2 independently represents an alkyl group having a carbon atom number of from 1 to 6, Me represents a methyl group, Ar represents a phenyl group or 1- or 2-naphthyl group, * represents a chiral carbon, and X represents a leaving group.