摘要:
To provide a process for increasing the proportion of an optical isomer of not only a compound having a closed ring but also a compound not having a closed ring when an optical isomer mixture of a compound having both a formyl group and a double bond capable of causing a carbonyl-ene ring closing reaction in the same molecule is subjected to a ring closing reaction. A process for increasing the proportion of an optical isomer characterized by subjecting an optical isomer mixture of a compound having both a formyl group and a double bond capable of causing a carbonyl-ene ring closing reaction in the same molecule to a ring closing reaction in the presence of a predetermined aluminum complex represented by the general formula: [Al2(L1)n(L2)3-n]m.
摘要:
Provided is a process in which cyclization of a compound having, in a molecule, a formyl group and a double bond which allow carbonyl-ene cyclization, the compound existing as a mixture of optical isomers thereof, increases the ratio of a particular optical isomer not only in a cyclized compound, but also in an unreacted compound. The process comprises performing, in the presence of a specified aluminum complex represented by the general formula: [Al2(L1)n(L2)3-n]m, cyclization of a compound having, in a molecule, a formyl group and a double bond which allow carbonyl-ene cyclization, the compound existing as a mixture of optical isomers thereof, to increase the ratio of a particular optical isomer.
摘要:
Provided is a process in which cyclization of a compound having, in a molecule, a formyl group and a double bond which allow carbonyl-ene cyclization, the compound existing as a mixture of optical isomers thereof, increases the ratio of a particular optical isomer not only in a cyclized compound, but also in an unreacted compound. The process comprises performing, in the presence of a specified aluminum complex represented by the general formula: [Al2(L1)n(L2)3-m]m, cyclization of a compound having, in a molecule, a formyl group and a double bond which allow carbonyl-ene cyclization, the compound existing as a mixture of optical isomers thereof, to increase the ratio of a particular optical isomer.
摘要:
A platinum complex represented by the general formula (1) below, useful as a phosphorescence emission material, a tetradentate ligand useful for synthesizing the platinum complex, and a light-emitting device containing at least one of the platinum complex. wherein ring B represents a nitrogen-containing aromatic heterocyclic ring; rings A, C and D each independently represent an aromatic or aromatic heterocyclic ring, while either of the rings C and D represents five-membered ring, the other represents a five- or six-membered ring; RA, RB, RC, and RD respectively represent substituents on the rings A, B, C, and D; two of XA, XB, XC, and XD represent a nitrogen atom that may be bound with the platinum atom by a coordinate bond, the others each independently represent a carbon atom or nitrogen atom that may be bound with the platinum atom by a covalent bond; Q represents a bivalent atom or atomic group bridging the rings B and C; and YC and YD each independently represent a carbon atom or nitrogen atom.
摘要翻译:由下述通式(1)表示的铂络合物,可用作磷光发射材料,可用于合成铂络合物的四齿配体,以及含有至少一种铂络合物的发光器件。 其中环B表示含氮芳族杂环; 环A,C和D各自独立地表示芳族或芳族杂环,而环C和D中的任一个表示五元环,另一个表示五元或六元环; R A,R B,R C和R D分别表示环A,B, C和D; X A,X B,X C和X D 2中的两个表示可以结合的氮原子 铂原子通过配位键,其余各自独立地表示可以通过共价键与铂原子结合的碳原子或氮原子; Q表示桥接环B和C的二价原子或原子团; 和Y和D各自独立地表示碳原子或氮原子。
摘要:
The invention aims at providing platinum complexes useful as materials for light emitting devices and extremely excellent in heat stability, luminous characteristics, and luminous efficiency, and a process for effective preparation thereof. The invention relates to platinum complexes represented by the general formula [1]: wherein any two of A, B and C are each independently an optionally substituted nitrogenous aromatic heterocyclic group and the other is optionally substituted aryl or optionally substituted heteroaryl; and Y is halogeno or an optionally substituted aryl or heteroaryl group which is bonded either directly or through oxygen (—O—) or sulfur (—S—) (with the proviso that when the adjacent two rings are nitrogenous aromatic heterocyclic groups, the cases wherein Y is chloro are excepted, while when the nonadjacent two rings are nitrogenous aromatic heterocyclic groups, the cases wherein Y is not halogeno are excepted).
摘要:
A camera body to which one of a plurality of interchangeable lenses is selectively attached is provided with: a shake detector 31; a shake compensation mechanism 32; and a controller 30 that compensates for the camera shake by driving the shake compensation mechanism based on the output from the shake detector. The controller 30 has a detector and a selector. The detector communicates with the attached interchangeable lens 20 and determines whether the interchangeable lens 20 itself has a shake compensation mechanism or not. The selector selects, when the detector determines that the interchangeable lens 20 has a shake compensation mechanism, both or one of the shake compensation mechanism of the camera body 10 and the shake compensation mechanism of the interchangeable lens 20 according to a predetermined condition as a compensation mechanism to be used for camera shake compensation.
摘要:
An object of the present invention is to provide a method for manufacturing an optically active menthol having fewer steps, which generates less environmentally polluting waste because a catalytic reaction is involved in all of the steps, and is capable of saving a production cost. The present invention relates to a method for manufacturing an optically active menthol, including the following steps: A-1) asymmetrically hydrogenating at least one of geranial and neral to thereby obtain an optically active citronellal, B-1) conducting a ring-closure reaction of the optically active citronellal in the presence of an acid catalyst to thereby obtain an optically active isopulegol, and C-1) hydrogenating the optically active isopulegol to thereby obtain an optically active menthol.
摘要:
A catalyst for obtaining isopulegol of high diastereoselectivity by highly selective cyclization reaction of citronellal is provided. The present invention relates to an organoaluminum compound obtained by reacting at least one organoaluminumoxy compound selected from the group consisting of chain aluminoxanes, cyclic aluminoxanes and bis(dialkylaluminumoxy)alkylboranes, with at least one hydroxy compound selected from the group consisting of diarylphenols, bis(diarylphenol) compounds, biaryldiols, dimethanols and silanols.
摘要:
A camera having a box-form cover member slidable on a camera body between a closed position and an opened position. The camera further has a heat releasing member that releases heat generated within the camera body, into a space formed between the camera body and the cover member.
摘要:
A camera includes an image sensor for sensing an image of an object to be photographed and producing an image data, a first memory for storing information concerning compression, a setting device for setting a compression ratio based on the information stored in the first memory, a compression device for compressing the image data at the set compression ratio, and a second memory for storing the compressed image data. Also, This camera includes a displaying device for displaying an image corresponding to the compressed image data in the viewfinder system so that the photographer can observe the image quality deterioration caused by the compression.