Method for optical resolution of DL-cysteine and (R,S)-1-(1-naphthyl)
ethylamine
    1.
    发明授权
    Method for optical resolution of DL-cysteine and (R,S)-1-(1-naphthyl) ethylamine 失效
    DL-半胱氨酸和(R,S)-1-(1-萘基)乙胺的光​​学拆分方法

    公开(公告)号:US4736060A

    公开(公告)日:1988-04-05

    申请号:US892059

    申请日:1986-08-01

    IPC分类号: C07D277/06 C07B57/00

    CPC分类号: C07D277/06

    摘要: Method for optical resolution of DL-cysteine by (1) reacting DL-cysteine with formaldehyde to prepare DL-thiazolidine-4-carboxylic acid (DL-TCA), (2) forming diastereomer salts of D-TCA and of L-TCA by reacting DL-TCA with an optically active 1-(1-naphthyl)ethylamine, (3) separating said diastereomer salts by difference of the solubilities thereof in a solvent, (4) recovering D-TCA from said diastereomer salt of D-TCA and finally obtain D-cysteine, and recovering L-TCA from said diastereomer salt of L-TCA and finally obtain L-cysteine.Method for optical resolution of (R,S)-1-(1-naphthyl)ethylamine (R,S)-NEA by (1) reacting an optically active cysteine with formaldehyde to prepare an optically active thiazolidine-4-carboxylic acid, (2) forming diastereomer salts of (R)-NEA and of (S)-NEA by reacting (R,S)-NEA with optically active thiazolidine-4-carboxylic acid, (3) separating said diastereomer salts of (R)-NEA and of (S)-NEA by difference of the solubilities thereof in a solvent, (4) recovering (R)-NEA from said diastereomer salt of (R)-NEA, and recovering (S)-NEA from said diastereomer salt of (S)-NEA.

    摘要翻译: (1)使DL-半胱氨酸与甲醛反应以制备DL-噻唑烷-4-羧酸(DL-TCA),(2)形成D-TCA和L-TCA的非对映异构体盐的方法,通过 使DL-TCA与光学活性1-(1-萘基)乙胺反应,(3)通过溶剂中溶解度的差异分离所述非对映异构体盐,(4)从D-TCA的非对映体盐中回收D-TCA和 最后得到D-半胱氨酸,从L-TCA的非对映异构体盐中回收L-TCA,最后得到L-半胱氨酸。 (1)将光学活性半胱氨酸与甲醛反应制备光学活性噻唑烷-4-羧酸的(R,S)-1-(1-萘基)乙胺(R,S)-NEA的光学拆分方法, 2)通过使(R,S)-NEA与光学活性噻唑烷-4-羧酸反应形成(R)-NEA和(S)-NEA的非对映异构体盐,(3)将(R)-NEA的所述非对映异构体盐 和(S)-NEA的溶解度的差异,(4)从(R)-NEA的所述非对映体盐中回收(R)-NEA,并从(R)-NEA的所述非对映异构体盐中回收(S)-NEA S)-NEA。

    Video and audio recorder and method of operating the same
    2.
    发明申请
    Video and audio recorder and method of operating the same 审中-公开
    视频和录音机及其操作方法

    公开(公告)号:US20050286873A1

    公开(公告)日:2005-12-29

    申请号:US11165214

    申请日:2005-06-24

    CPC分类号: G11B20/10 H04N19/115

    摘要: A video and audio recorder and a method of operating the same. The recorder includes a TV signal receiving unit, a video/audio compression recording control unit for compressing the video and audio signals and outputting a compressed video/audio multiplex data at the time of recording a program, an accumulation recording unit for recording the compressed video/audio multiplex data in a recording medium, and a recording control unit for controlling the video/audio compression recording control unit thereby to control the program recording operation. The recording control unit, based on the program information of the program to be recorded, controls the program recording operation by setting proportion information between the video recording bit rate and the audio recording bit rate in the compression process of the video and audio signals in the video/audio compression recording control unit.

    摘要翻译: 视频和录音机及其操作方法。 记录器包括电视信号接收单元,视频/音频压缩记录控制单元,用于在录制节目时压缩视频和音频信号并输出​​压缩的视频/音频多路复用数据,用于记录压缩视频的累积记录单元 /音频复用数据,以及记录控制单元,用于控制视频/音频压缩记录控制单元从而控制节目记录操作。 记录控制单元基于要记录的节目的节目信息,通过在视频和音频信号的压缩处理中在视频记录比特率和音频记录比特率之间设置比例信息来控制节目记录操作 视频/音频压缩记录控制单元。