摘要:
A novel ruthenium complex which is a highly efficient catalyst useful for the production of optically active 3-quinuclidinols, and a process for production of optically active 3-quinuclidinols using the ruthenium complex as a catalyst, where the optically active 3-quinuclidinols are useful as an optically active, physiologically active compound utilized in medicines and agrichemicals or as a synthetic intermediate such as a liquid crystal material.
摘要:
A sulfonate catalyst represented by the formula below and a ketone compound are placed in a solvent, and the ketone compound is hydrogenated by mixing in the presence of hydrogen to produce an optically active alcohol.
摘要:
A sulfonate catalyst represented by the formula below and a ketone compound are placed in a solvent, and the ketone compound is hydrogenated by mixing in the presence of hydrogen to produce an optically active alcohol.
摘要:
A ruthenium complex RuCl[(S,S)-Tsdpen](p-cymene) represented by a formula below and a ketone compound are placed in a polar solvent, and the resulting mixture is mixed under pressurized hydrogen to hydrogenate the ketone compound and to thereby produce an optically active alcohol:
摘要:
The present invention provides an asymmetric reduction catalyst effective in preparing optically-active alcohol compounds having various functional groups, and a process for preparing optically-active alcohol compounds using said asymmetric reduction catalyst.The organic metal compound of the present invention is represented by the following general formula (1): wherein R1 and R2 may be mutually identical or different, and are an alkyl group, a phenyl group, a naphthyl group, a cycloalkyl group, or an alicyclic ring formed by binding R1 and R2, which may have a substituent; R3 is a hydrogen atom or an alkyl group; Cp is a cyclopentadienyl group, which may have a substituent, bound to M1 via a π bond; X1 is a halogen atom or a hydrido group; M1 is rhodium or iridium; and * denotes asymmetric carbon.
摘要:
The present invention provides an asymmetric reduction catalyst effective in preparing optically-active alcohol compounds having various functional groups, and a process for preparing optically-active alcohol compounds using said asymmetric reduction catalyst.The organic metal compound of the present invention is represented by the following general formula (1): wherein R1 and R2 may be mutually identical or different, and are an alkyl group, a phenyl group, a naphthyl group, a cycloalkyl group, or an alicyclic ring formed by binding R1 and R2, which may have a substituent; R3 is a hydrogen atom or an alkyl group; Cp is a cyclopentadienyl group, which may have a substituent, bound to M1 via a π bond; X1 is a halogen atom or a hydrido group; M1 is rhodium or iridium; and * denotes asymmetric carbon.
摘要:
The object of the present invention is to solve the problems in the prior arts, and to find more improved reaction conditions for suppressing the racemization of the product and obtaining an optically active alcohol at a high optical purity. The inventors achieved to solve the above problems by using a solvent system that is capable of resolving both an asymmetric catalyst and a formate salt, allowing the hydrogen source and the asymmetric catalyst to be present in the same phase.
摘要:
The object of the present invention is to solve the problems in the prior arts, and to find more improved reaction conditions for suppressing the racemization of the product and obtaining an optically active alcohol at a high optical purity. The inventors achieved to solve the above problems by using a solvent system that is capable of resolving both an asymmetric catalyst and a formate salt, allowing the hydrogen source and the asymmetric catalyst to be present in the same phase.
摘要:
A cylindrical linear motor includes a stator and a movable element disposed via a clearance with respect to the stator and movable rectilinearly with respect to the stator. The movable element has a plurality of permanent magnets fixed to a movable element core. The stator salient poles 3b are pitched at τs and the permanent magnets 11 are pitched at τp so that a relationship of 3/4
摘要:
Disclosed are a high-damping and high-thrust cylindrical linear motor and a motor-driven power steering device. A stator includes three-phase stator and a stator core. A slider includes a slider core and permanent magnets. The stator core includes stator-core salient poles, two auxiliary poles and yoke units with a small poles on its surface of the side of the slider, the auxiliary poles being deployed at both ends of the stator-core salient poles, the yoke units configuring a magnetic circuit in cooperation with the stator core and the auxiliary poles. The magnetic circuit is shared among the three phases. Polarities of magnets of the slider become an identical polarity, each of the plurality of permanent magnets being positioned at a position which is opposed to each of the plurality of small poles included in one stator-core salient pole out of the plurality of stator-core salient poles.