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    • 112. 发明授权
    • Preheating control apparatus for diesel engines
    • 柴油机预热控制装置
    • US4962300A
    • 1990-10-09
    • US239608
    • 1981-03-02
    • Kiyoshi Watanabe
    • Kiyoshi Watanabe
    • F02B3/06F02P19/02
    • F02P19/025F02B3/06
    • A preheating control apparatus for diesel engines of the present invention is provided wherein the voltage developed across a sensing resistor connected in series with a glow plug, which voltage is indicative of the temperature of the glow plug, is amplified by an amplifier. The amplified voltage is compared with a predetermined reference voltage to control the preheating current through the glow plug so that the temperature of the glow plug can be precisely controlled without increasing the resistance value of the sensing resistor. Further, a protection circuit may be provided to end the preheating current to the glow plug in response to an abnormal change in the voltage applied to the glow plug.
    • 提供了本发明的柴油发动机的预热控制装置,其中跨越与电热塞串联的感测电阻器产生的电压被放大器放大,该电热塞指示电热塞的温度。 将放大的电压与预定的参考电压进行比较,以控制通过电热塞的预热电流,使得可以精确地控制电热塞的温度而不增加感测电阻器的电阻值。 此外,可以提供保护电路以响应于施加到电热塞的电压的异常变化而将预热电流结束到电热塞。
    • 114. 发明授权
    • Process for preparing optically active hydantoins
    • 制备光学活性乙内酰脲的方法
    • US4812406A
    • 1989-03-14
    • US775090
    • 1985-09-12
    • Satomi TakahashiYukio YamadaYasuyoshi UedaYasuhiro KatayamaYoshio ShimadaKiyoshi Watanabe
    • Satomi TakahashiYukio YamadaYasuyoshi UedaYasuhiro KatayamaYoshio ShimadaKiyoshi Watanabe
    • C07D233/72C07D233/74C07D311/68C07D317/60C07D405/06C07D491/10C12P17/02C12P17/10C12P17/18C12P41/00C12R1/01C12R1/07C12R1/15C12R1/365C12P13/04
    • C07D405/06C07D233/74C07D311/68C07D317/60C07D491/10C12P17/02C12P17/10C12P17/18C12P41/009
    • A process for preparing optically active hydantoins having the general formula (II): ##STR1## wherein R.sup.1 and R.sup.2, which are different from each other, are independently alkyl group, aralkyl group, aryl group, substituted alkyl group, substituted aralkyl group, or substituted aryl group, or R.sup.1 and R.sup.2 form an asymmetric cyclic compound, characterized in that one configuration of racemic N-carbamoyl-.alpha.-amino acid having the general formula (I): ##STR2## wherein R.sup.1 and R.sup.2 are as above, is enzymatically converted into the corresponding hydantoins.The present invention provides a process for an optical resolution with a high efficiency which can be used for the synthesis of (S)-6-fluoro-spiro-[chroman-4,4'-imidazolidine]-2',5'-dione (USAN; Sorbinil), which is an optically active hydrantoins attracting public attention as a preventive or a remedy for the particular chronic symptoms of diabetes such as cataract and neuropathy, and (S)-.alpha.-methyl-3,4-dihydroxyphenylalanine (L-methyldopa), which is an optically active amino acid widely used as antihypertensives. Further, the present invention provides a novel finding that N-carbamoyl-.alpha.-amino acid having no hydrogen atom on its .alpha.-carbon atom can be biochemically converted into hydantoins by an enzymatic cyclization reaction.
    • 制备具有通式(II)的光学活性乙内酰脲的方法:其中R1和R2彼此不同,其独立地为烷基,芳烷基,芳基,取代的烷基,取代的芳烷基 基团或取代的芳基,或R 1和R 2形成不对称环状化合物,其特征在于具有通式(I)的外消旋N-氨基甲酰基-α-氨基酸的一种构型:其中R1和R2 如上所述,被酶转化成相应的乙内酰脲。 本发明提供了可用于(S)-6-氟 - 螺 - [苯并二氢吡喃-4,4'-咪唑烷] -2',5'-二酮的合成的高效光学拆分方法。 (USAN; Sorbinil)是一种光学活性的水解素,引起公众的注意,作为预防或治疗糖尿病的特殊慢性症状如白内障和神经病,以及(S)-α-甲基-3,4-二羟基苯丙氨酸(L 甲基多巴),其是广泛用作抗高血压药物的光学活性氨基酸。 此外,本发明提供了一种新的发现,其α-碳原子上不具有氢原子的N-氨基甲酰基-α-氨基酸可以通过酶环化反应生物化学转化成乙内酰脲。
    • 116. 发明授权
    • Method for producing optically active glycol derivatives
    • 光学活性二醇衍生物的制备方法
    • US4745066A
    • 1988-05-17
    • US846766
    • 1986-04-01
    • Shigeki HamaguchiTakehisa OhashiKiyoshi Watanabe
    • Shigeki HamaguchiTakehisa OhashiKiyoshi Watanabe
    • C07B31/00C07C67/00C07C301/00C07C303/22C07C309/72C12P11/00C12P41/00C12R1/01C12R1/38C12R1/66C12R1/785C12R1/845
    • C12P41/004C07C309/00C12P11/00
    • A method for producing optically active glycol derivatives by biochemical resolution which comprises contacting a racemic ester of the general formula 1 ##STR1## (wherein R.sub.1 is an aliphatic hydrocarbon group of 1 to 16 carbon atoms, R.sub.2 is an aliphatic hydrocarbon group of 1 to 8 carbon atoms, and R.sub.3 is an aromatic hydrocarbon group such as phenyl, tolyl or naphtyl) with a microorganism- or animal organ-derived enzyme having stereoselective hydrolytic activity to asymmetrically hydrolyze said racemic ester of general formula 1 to produce an optically active alcohol of general formula 2* ##STR2## (wherein R.sub.1 and R.sub.3 have the same meanings as defined above) and an unreacted ester of the general formula 1* ##STR3## (wherein R.sub.1, R.sub.2 and R.sub.3 have the same meanings as defined hereinbefore), separating the optically active compounds from each other, hydrolyzing said ester of general formula 1* to give an optically active glycol derivative which is antipodal to the alcohol of general formula 2* and, then, isolating the same optically active glycol derivative. The invention provides a method for producing optically active glycol derivatives, which is expedient, does not require costly reagents and is suited to commercial scale production.
    • 一种通过生物化学拆分制备光学活性二醇衍生物的方法,其包括使通式1的外消旋酯1(其中R 1是1至16个碳原子的脂族烃基,R 2是1的脂族烃基, 8个碳原子,并且R 3是芳族烃基如苯基,甲苯基或萘基)与具有立体选择性水解活性的微生物或动物器官衍生的酶不对称地水解所述通式1的外消旋酯以产生光学活性的醇 通式2 * 2 *(其中R 1和R 3具有与上述相同的含义)和通式1 *未反应的酯*(其中R 1,R 2和R 3具有与定义相同的含义) 将光学活性化合物彼此分离,水解所述通式1 *的酯,得到对通式为醇的对映体的光学活性二醇衍生物 2 *,然后分离相同的光学活性二醇衍生物。 本发明提供了一种制备光学活性二醇衍生物的方法,这是有利的,不需要昂贵的试剂并且适于商业规模生产。
    • 119. 发明授权
    • Stable composition of S-adenosyl-L-methionine
    • S-腺苷-L-甲硫氨酸的稳定组成
    • US4369177A
    • 1983-01-18
    • US208842
    • 1980-11-20
    • Yuichi KozakiShingo HataHajime KawaharadaKiyoshi Watanabe
    • Yuichi KozakiShingo HataHajime KawaharadaKiyoshi Watanabe
    • C07H19/16A61K31/70
    • C07H19/16Y10S514/97Y10S514/973
    • A stable composition of S-adenosyl-L-methionine is disclosed which includes a salt of S-adenosyl-L-methionine and a pharmaceutically acceptable, water-soluble salt of a bivalent or trivalent metal. The salt of S-adenosyl-L-methionine is, for example, a salt of S-adenosyl-L-methionine with hydrochloric acid, sulfuric acid, p-toluenesulfonic acid, phosphoric acid, formic acid, acetic acid, citric acid, tartaric acid, or maleic acid; or a double salt of S-adenosyl-L-methionine with the foregoing acids. The salt of a bivalent or trivalent metal is, for example, calcium chloride, ferric chloride, magnesium chloride, or magnesium sulfate. A process for preparing the composition is also disclosed. The composition is suitable for preparing pharmaceutical preparations of S-adenosyl-L-methionine.
    • 公开了S-腺苷-L-甲硫氨酸的稳定组合物,其包括S-腺苷-L-甲硫氨酸的盐和二价或三价金属的药学上可接受的水溶性盐。 S-腺苷-L-甲硫氨酸的盐例如是S-腺苷-L-甲硫氨酸与盐酸,硫酸,对甲苯磺酸,磷酸,甲酸,乙酸,柠檬酸,酒石酸的盐 酸或马来酸; 或S-腺苷-L-甲硫氨酸与上述酸的双重盐。 二价或三价金属的盐是例如氯化钙,氯化铁,氯化镁或硫酸镁。 还公开了制备该组合物的方法。 该组合物适用于制备S-腺苷-L-甲硫氨酸的药物制剂。