Process for preparing optically active alcoholic compounds
    2.
    发明授权
    Process for preparing optically active alcoholic compounds 失效
    光学活性醇类化合物的制备方法

    公开(公告)号:US06187966B1

    公开(公告)日:2001-02-13

    申请号:US09011176

    申请日:1999-07-15

    IPC分类号: C07C3346

    摘要: A process for preparing optically active alcoholic compounds wherein a carbonyl compound is assymmetrically reduced in an economical and practical manner. The process comprises treating a prochiral carbonyl compound represented by the general formula (1) with an optically active organoaluminum compound represented by the general formula (2) to conduct asymmetric reduction, thereby preparing an optically active alcoholic compound represented by the general formula (3).

    摘要翻译: 一种制备光学活性醇化合物的方法,其中羰基化合物以经济和实用的方式不对称还原。该方法包括用通式(1)表示的光学活性有机铝化合物处理由通式(1)表示的前手性羰基化合物 2)进行不对称还原,由此制备由通式(3)表示的光学活性醇化合物。

    Processes for producing .alpha.-halo ketones, .alpha.-halohydrins and
epoxides
    3.
    发明授权
    Processes for producing .alpha.-halo ketones, .alpha.-halohydrins and epoxides 失效
    制备α-卤代酮,α-卤代醇和环氧化物的方法

    公开(公告)号:US5929284A

    公开(公告)日:1999-07-27

    申请号:US722102

    申请日:1996-12-18

    摘要: Processes for efficiently producing .alpha.-halo ketones, .alpha.-halohydrins and epoxides on an industrial scale. The prosesses include one for producing an .alpha.-halo ketone of general formula (3) by decarboxylating a product of reaction between a carboxilic acid derivative of general formula (1) and a metal enolate prepared from an .alpha.-haloacetic acid of general formula (2) or an acceptable salt thereof, one for producing an by reducing the .alpha.-halo ketone (3), and one for producing an epoxide (13) by treating the .alpha.-halohydrin (11) with a base to effect ring closure. The above prosesses are particularly suitable for producing optically active .alpha.-halo ketones, .alpha.-halohydrins and epoxides from the corresponding .alpha.-amino acid derivatives. ##STR1##

    摘要翻译: PCT No.PCT / JP96 / 00212 Sec。 371日期:1996年12月18日 102(e)1996年12月18日日期PCT 1996年2月2日PCT PCT。 第WO96 / 23756号公报 日期1996年8月8日工业规模高效生产α-卤代酮,α-卤代醇和环氧化物的方法。 前药包括通过使通式(1)的羧酸衍生物与由通式(2)的α-卤代乙酸制备的金属烯醇化物脱羧的方法来制备通式(3)的α-卤代酮, )或其可接受的盐,其中通过用碱来还原α-卤代酮(3)和通过用碱处理α-卤代醇(11)来制备环氧化物(13)来制备,以实现闭环。 上述产品特别适用于从相应的α-氨基酸衍生物制备光学活性的α-卤代酮,α-卤代醇和环氧化物。

    PROCESS BELT FOR PAPERMAKING AND METHOD FOR MAKING THE SAME
    9.
    发明申请
    PROCESS BELT FOR PAPERMAKING AND METHOD FOR MAKING THE SAME 有权
    造纸用工艺皮带及其制造方法

    公开(公告)号:US20110127000A1

    公开(公告)日:2011-06-02

    申请号:US12954792

    申请日:2010-11-26

    IPC分类号: D21G9/00 B05D3/02

    CPC分类号: D21F3/0227 Y10S162/901

    摘要: A process belt for papermaking with a long operational life comprises an integrated structure of a reinforcing fibrous base material 6 and a polyurethane layer, the reinforcing fibrous base material being embedded in the polyurethane, wherein an inorganic filler selected from calcined kaolin clay, fused silica and zeolite is homogeneously dispersed in the polyurethane.

    摘要翻译: 用于造纸的工艺带具有长的使用寿命,包括加强纤维基材6和聚氨酯层的整体结构,该增强纤维基材嵌入聚氨酯中,其中选自煅烧高岭土,熔融二氧化硅和 沸石均匀分散在聚氨酯中。