Takasago International Corporation

Ushio Denki Kabushiki Kaisha

Meiji Seika Pharma Co., Ltd.

Hideki Nara

Taichiro Touge

Takahiro Fujiwara

Tomohiko Hakamata

Takashi Imai

Shigeru Tanaka

Takashi Miura

Noboru Sayo

Kenya Ishida

Hideo Shimizu

Tohru Yokozawa

Toshiyuki Murayama

Wataru Kuriyama

Tsukasa Sotoguchi

Takashi Moroi

Kazuhiko Matsumura

Kenji Yagi

Osamu Ogata

Motonobu Takenaka

Kenzo Sumi

Tomohiko Hakamada

Masaaki Mitomi

Nobuto Minowa

Yoshimasa Matsushima

Shinya Yamada

Nozomu Nakanishi

Yuji Nakayama

Kazushi Mashima

Shigeru Mitsuhashi

Yuichi Miura

Yoshiharu Gonda

Takahiro Ishikawa

Takuto Nagano

Kiyoto Hori

Tadahide Hatakeyama

Takayuki Kozakura

Yusuke Kita

Atsuhiro Iimuro

Kenta Yamaji

Shoji Hida

Yoshiki Hasegawa

Kunimori Aoki

A mirror unit includes a plurality of reflective mirrors, a mirror holder on which the plurality of reflective mirrors are disposed and an adhesive member to bond and fix the reflective mirrors to the mirror holder. The mirror holder has a contact area where the reflective mirrors are to be in contact and a step in a direction away from the reflective mirror with respect to the contact area. The step has an adhesive fixing area on which an adhesive member is mounted.

Mirror unit and light source device having the same

The present invention relates to a method for releasing an unsaturated aldehyde or ketone represented by the general formula (2) by irradiating the compound represented by the general formula (1) with light, in which the compound represented by the general formula (1) is used as a flavor or fragrance precursor: 

Method for releasing unsaturated aldehyde or ketone

The present invention provides a novel ruthenium complex that is easy to produce and handle and that can be supplied relatively inexpensively, a method for producing this ruthenium complex, a method for producing alcohols and the like using this ruthenium complex as a catalyst, a method for producing carbonyl compounds using this ruthenium complex as a catalyst, and a method for producing N-alkylamine compounds using this ruthenium complex as a catalyst. The present invention pertains to a ruthenium complex represented by general formula (1) RuXX(PNP) (NHC)(Solv)(1) (in general formula (1), Xand Xeach independently represent a monovalent anionic monodentate ligand; PNP represents a tridentate aminodiphosphine ligand, NHC represents an N-heterocyclic carbene derived from a nitrogen-containing heterocyclic ring, and Solv represents a coordinating solvent; and m represents an integer from 1 to 3, n represents an integer from 0 to 2, and 1&#x2264;m+n&#x2264;3.), a method for producing the same, a catalyst including the same, and methods for producing various organic compounds using this catalyst.

Ruthenium complex, method for producing same, and use of same

The present invention provides a method for producing a reduction reaction product, wherein recovery of the reaction solvent and/or distillation is carried out after adding a nitrogen-containing compound into a reaction liquid of a reduction reaction that has been conducted using a transition metal complex. The present invention is capable of suppressing decrease in the optical purity of the reduction reaction product due to the transition metal complex used as a catalyst.

Method for preventing decrease in optical purity

The present invention provides a simple, efficient, and industrially advantageous method for the alkylation of amines. The present invention relates to a production method for N-alkylamines whereby an amine is reacted with an alcohol in the presence of a ruthenium complex represented by general formula (1): RuXY(CO)(L) (wherein X and Y can be the same or different and represent a monovalent anionic ligand, and L represents a tridentate aminodiphosphine ligand).

Method for alkylation of amines

The present invention pertains to a method for producing an optically active compound which includes a step for reducing an imino group of an imine compound or a step for reducing an unsaturated bond of a heterocyclic compound, while in the presence of hydrogen gas as a hydrogen donor and one or more types of complexes selected from a group consisting of a complex represented by general formula (1), a complex represented by general formula (2), a complex represented by general formula (3), and a complex represented by general formula (4) (the general formulas (1)-(4) are as stipulated by claim).

Method for producing optically active compound, and novel metal-diamine complex

Provided is a catalyst for asymmetric reduction, which can be produced by a convenient and safe production method, has a strong catalytic activity, and has excellent stereoselectivity. The present invention relates to a ruthenium complex represented by the following formula (1): wherein Rrepresents an alkyl group or the like; Y represents a hydrogen atom; X represents a halogen atom or the like; j and k each represent 0 or 1; Rand Reach represent an alkyl group or the like; Rto Reach represent a hydrogen atom, an alkyl group or the like; Z represents oxygen or sulfur; nrepresents 1 or 2; and nrepresents an integer from 1 to 3, a method for producing the ruthenium complex, a catalyst for asymmetric reduction formed from the ruthenium complex, and methods for selectively producing an optically active alcohol and an optically active amine using the catalyst for asymmetric reduction. 

Ruthenium-diamine complexes and method for producing optically active compounds

The present invention provides a novel ruthenium complex which has an excellent catalytic activity in terms of reactivity for asymmetric reduction of a carbonyl compound and enantioselectivity, a catalyst using the ruthenium complex, and a method for preparing optically active alcohol compounds using the ruthenium complex. The present invention relates to a ruthenium complex having ruthenacycle structure, a catalyst for asymmetric reduction consisting of the ruthenium complex, and a method for preparing optically active alcohol using the ruthenium complex.

Ruthenium complex and method for preparing optically active alcohol compound

The present invention provides a method for producing a compound represented by general formula (1) (wherein R, R, R, R-R, A-A, nand nare as defined in the description), which is characterized by reacting a compound represented by general formula (2) (wherein R-R, A-A, n, nand B are as defined in the description) with a diamine compound represented by general formula (3) (wherein R-Rare as defined in the description). The present invention is a method for producing a diamine compound, which is useful for the formation of a ruthenium-diamine complex, under mild conditions, said method being able to be put in industrial practice. 

Method for producing diamine compound

Disclosed is a method for producing an optically active 2-arylpiperidinium salt, comprising asymmetrically hydrogenating a pyridinium salt in the presence of an iridium complex and hydrogen, the 2-arylpiperidinium salt being represented by the following general formula (1):  

Method for producing optically active 2-arylpiperidinium salt

Provided by the present invention is a method for efficient oxidation of alcohols by using, as a catalyst for dehydrogenation oxidation, a ruthenium complex which can be easily produced and easily handled and is obtainable at a relatively low cost. The invention relates to a method of producing a compound having a carbonyl group by dehydrogenation oxidation of alcohols by using as a catalyst the ruthenium carbonyl complex represented by the following general formula (1) RuXY(CO)(L) (1) (in the general formula (1), X and Y may be the same or different from each other and represent an anionic ligand, and L represents a tridentate aminodiphosphine ligand).

Method for producing compound with carbonyl group by using ruthenium carbonyl complex having tridentate ligand as dehydrogenation oxidation catalyst

Provided is a ruthenium complex that is represented by general formula (1*) and is useful as an asymmetric reduction catalyst. (In the formula, * is an asymmetric carbon atom; Ris an arenesulfonyl group, and the like; Rand Rare a phenyl group, and the like; Rthrough Rare selected from a hydrogen atom, Calkyl group, and the like, but Rthrough Rare not simultaneously hydrogen atoms; X is a halogen atom and the like; j and k are each either 0 or 1; and j+k is 0 or 2.) 

Ruthenium-diamine complex and method for producing optically active compound

Growing community of inventors

Fujisawa, Japan

Hideki Nara