摘要:
A tertiary phosphine compound of the formula (1): ##STR1## wherein R.sup.1 and R.sup.2 represent independently from each other a hydrogen atom or a methyl group, or together form --CH.dbd.CH--CH.dbd.CH--; R.sup.3 is a hydrogen atom or a cycloalkyl group having 5 to 7 carbon atoms or a lower alkyl group which may be substituted with a halogen atom, a lower alkoxy group, a lower alkoxyalkoxy group or a phenyl group; X.sup.1 is a halogen atom when both R.sup.1 and R.sup.2 are hydrogen atoms, or a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group when at least one of R.sup.1 and R.sup.2 is not a hydrogen atoms; and m is an integer of 1 to 5, which is useful as a ligand of a transition metal complex that can catalyze various reactions.
摘要:
A phosphine compound represented by formula (I): ##STR1## wherein Ph represents a phenyl group; and R represents a lower alkyl group or --OR.sup.1, wherein R.sup.1 represents a hydrogen atom, a cycloalkyl group having from 5 to 7 carbon atoms, or an alkyl group having from 1 to 6 carbon atoms which may be substituted with a halogen atom, a lower alkoxy group, a lower alkoxy group-substituted lower alkoxy group, or a phenyl group, and a transition metal complex using the phosphine compound (I) as a ligand are disclosed. The transition metal complex, when used as a catalyst for various enantioselective synthesis reactions, e.g., enantioselective silylation reaction, provides a desired product in high yield at high optical purity. The absolute configuration of the product can be arbitrarily selected by selecting the optical isomer of the ligand in the transition metal complex catalyst.
摘要:
An object of the present invention is to provide a base plate for a lithographic printing plate comprising a photosensitive layer that prevent the occurrence of the fingerprint rub-off phenomena and abrasion phenomena and offer superior anti-abrasiveness and chemical resistance. The present invention provides a copolymer having monomeric units shown in formula (I) and (II); an image-forming composition comprising the copolymer; and a base plate for a lithographic printing plate comprising, on a support structure, a photosensitive layer that contains the copolymer.
摘要:
To provide a catalyst that has sufficient catalytic activity as a platinum catalyst and yet is readily separated from a target material and can be reused. A resin-supported platinum cluster catalyst containing a resin layer comprising a platinum particle core, the average diameter of which is from 1 nm to 10 nm, and a compound containing nitrogen (general formula R1NH2) surrounding the core. This catalyst can be obtained by forming a platinum complex from a compound containing nitrogen represented by the general formula R1NR22 (in the formula, R1 represents a carrier with a hydrophilic molecular chain and R2 represents a hydrogen atom, an alkyl group and the like) and a platinum compound represented by the general formula M(PtX4-nR3n)m (in the formula, M represents an alkali metal and the like, X represents a halogen atom and the like, R3 represents an unsaturated organic ligand, n represents an integer from zero to four and m represents an integer indicating the electrical charge of the metal, M) and allowing this platinum complex to react with a reducing agent in an aqueous solvent.
摘要:
An object of the present invention is to provide a support for lithographic printing plates provided with a photosensitive layer containing an acid generator and an acid-decomposable compound, that offers superior sensitivity, chemical resistance, print durability, and little scumming during printing. The present invention provides an aluminum support for a lithographic printing plate, the support being obtainable by treating a surface of an anodized aluminum plate with a treatment liquid comprising metal fluoride, metal phosphate salt, and perchlorate, and a base plate for a lithographic printing plate using the same.
摘要:
To provide a catalyst that has sufficient catalytic activity as a platinum catalyst and yet is readily separated from a target material and can be reused. A resin-supported platinum cluster catalyst containing a resin layer comprising a platinum particle core, the average diameter of which is from 1 nm to 10 nm, and a compound containing nitrogen (general formula R1NH2) surrounding the core. This catalyst can be obtained by forming a platinum complex from a compound containing nitrogen represented by the general formula R1NR22 (in the formula, R1 represents a carrier with a hydrophilic molecular chain and R2 represents a hydrogen atom, an alkyl group and the like) and a platinum compound represented by the general formula M(PtX4-nR3n)m (in the formula, M represents an alkali metal and the like, X represents a halogen atom and the like, R3 represents an unsaturated organic ligand, n represents an integer from zero to four and m represents an integer indicating the electrical charge of the metal, M) and allowing this platinum complex to react with a reducing agent in an aqueous solvent.
摘要:
One aspect of the present invention can include a playback device capable of externally receiving a playback signal for playing back a sound or an image, and capable of transmitting the playback signal to the playback device if it is detected that a predetermined electric source was externally supplied.
摘要:
One aspect of the present invention can include a playback device capable of externally receiving a playback signal for playing back a sound or an image, and capable of transmitting the playback signal to the playback device if it is detected that a predetermined electric source was externally supplied.
摘要:
The present invention provides a catalyst, which has enough catalytic activity as a transition metal particle catalyst including platinum family and the like, is easily separable from products, is reusable and is easily prepared. To prepare the transition metal cluster catalyst of the present invention, an insoluble complex is prepared by forming a complex between a polymer with nitrogen-containing group, such as pyridinium and ammonium group in the principal chain, and a later transition metal compound; and then reducing the complex with a reductant. The transition metal forms clusters, which are stabilized by the polymers. Namely, the present invention is a transition metal cluster catalyst, wherein transition metal clusters are supported by a polymer, which is obtained by reduction reaction of a complex of a transition metal and a polymer with nitrogen-containing group. The transition metal cluster catalyst of the present invention is an extremely useful catalyst for oxidation, reduction, cross-coupling, Heck reaction, alkylation reaction and the like.
摘要:
A polymer-carrying optically active binaphthyl type oxazoline compound having axial asymmetry, represented by the following general formula (1) (wherein R1 and R2 may be the same or different from each other and each represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms or the like; R3 is a hydrogen atom or —R5—X—R6; R4 is a hydrogen atom or the like; R5 is a straight- or branched-chain aliphatic hydrocarbon chain which may have a directly or indirectly bonded substituent; X is CH2, CO2, O, CONR7 or NR7; R6 is a directly or indirectly bonded polymer; and R7 is a hydrogen atom or the like), and to a transition metal complex which uses the compound as the ligand.
摘要翻译:由以下通式(1)表示的具有轴不对称性的聚合物携带光学活性的联萘型恶唑啉化合物(其中R 1和R 2可以相同或不同) 彼此分别表示氢原子,碳原子数为1〜6的烷基等; R 3是氢原子或-R 5 -SR R 4是氢原子等; R 5是直链或支链脂族烃链,其可以具有 直接或间接键合的取代基; X是CH 2,CO 2,O,CONR 7或NR 7; R 6是直接或间接结合的聚合物; R 7是氢原子等)和使用该化合物作为配体的过渡金属络合物。