Process for the preparation of 5-amino-3H-thiazolo[4,5-d]pyrimidin-2-one
    1.
    发明授权
    Process for the preparation of 5-amino-3H-thiazolo[4,5-d]pyrimidin-2-one 有权
    制备5-氨基-3H-噻唑并[4,5-d]嘧啶-2-酮的方法

    公开(公告)号:US07781581B2

    公开(公告)日:2010-08-24

    申请号:US11601719

    申请日:2006-11-20

    IPC分类号: C07D487/04

    CPC分类号: C07D513/04

    摘要: The present invention relates to a process for the preparation of 5-amino-3H-thiazolo[4,5-d]pyrimidin-2-one which is a useful intermediate in the preparation of certain thiazolo[4,5-d]pyrimidine nucleosides. The process comprises halogenating 2,4-diaminopyrimidine to form 2,4-diamino-5-halo-pyrimidine and then cyclocondensing the 2,4-diamino-5-halo-pyrimidine to form 5-amino-3H-thiazolo[4,5-d]pyrimidin-2-thione. The 5-amino-3H-thiazolo[4,5-d]pyrimidin-2-thione is then oxidized to afford the 5-amino-3H-thiazolo[4,5-d]pyrimidin-2-one.

    摘要翻译: 本发明涉及制备5-氨基-3H-噻唑并[4,5-d]嘧啶-2-酮的方法,其是制备某些噻唑并[4,5-d]嘧啶核苷的有用中间体 。 该方法包括将2,4-二氨基嘧啶卤化形成2,4-二氨基-5-卤代嘧啶,然后使2,4-二氨基-5-卤代嘧啶环化以形成5-氨基-3H-噻唑并[4,5 d]嘧啶-2-硫酮。 然后将5-氨基-3H-噻唑并[4,5-d]嘧啶-2-硫酮氧化得到5-氨基-3H-噻唑并[4,5-d]嘧啶-2-酮。

    Process for the enzymatic resolution of lactams
    6.
    发明授权
    Process for the enzymatic resolution of lactams 失效
    内切酶的酶解方法

    公开(公告)号:US06638758B2

    公开(公告)日:2003-10-28

    申请号:US09876199

    申请日:2001-06-06

    IPC分类号: C07C104

    摘要: A method of separating enantiomeric lactam esters. The lactam esters are contacted with a biocatalyst, such as an enzyme or a microorganism, in a solution wherein only one enantiomer is selectively hydrolyzed to give the optically active isomer of the corresponding acid. The hydrolysis product is then separated from the unreacted lactam esters. The enzyme is then recycled for reuse in the next enzymatic resolution. The undesired isomer is also racemized and reused in the next enzymatic resolution.

    摘要翻译: 分离对映体内酰胺酯的方法。 将内酰胺酯与生物催化剂如酶或微生物在溶液中接触,其中只有一个对映体被选择性水解,得到相应酸的旋光异构体。 然后将水解产物与未反应的内酰胺酯分离。 然后将酶再循环以在下一酶分解中重新使用。 不需要的异构体也是外消旋化的并且在下一个酶解决方案中重复使用。

    Process for preparing higher order cuprate complexes
    10.
    发明授权
    Process for preparing higher order cuprate complexes 失效
    制备高级铜酸盐络合物的方法

    公开(公告)号:US5011958A

    公开(公告)日:1991-04-30

    申请号:US427067

    申请日:1989-10-25

    IPC分类号: C07F1/08 C07F7/22

    CPC分类号: C07F1/08 C07F7/2212

    摘要: This invention encompasses a process for preparing higher order cuprate complexes which contain a carbanion for the formation of carbon to carbon bonds in reactions such as epoxide addition. The complex is formed by reacting a first cuprate complex with a stannane such that the carbanion to be used to form carbon to carbon bonds is transferred from the stannane to the first cuprate complex to form a different higher order cuprate complex. This process permits the in situ preparation of a higher order cuprate complex having the carbanion desired to be used in a synthetic reaction. Higher order cuprate complexes derived from the reaction of a cuprate complex with 1,2-bis-tri-n-butylstannyl ethylene are particularly useful for the addition to epoxides to form vinyl tin intermediates useful for preparing omega side chains of prostaglandins.

    摘要翻译: 本发明包括一种制备高级铜酸盐配合物的方法,其中含有用于在诸如环氧化物添加的反应中形成碳 - 碳键的碳负离子。 络合物通过使第一铜酸盐络合物与锡烷反应形成,使得用于形成碳 - 碳键的碳负离子从锡烷转移到第一铜酸盐络合物以形成不同的高级铜酸盐络合物。 该方法允许原位制备具有期望在合成反应中使用的碳负离子的高级铜酸盐络合物。 衍生自铜酸盐络合物与1,2-双 - 三正丁基甲锡烷基乙烯反应的高级铜酸盐络合物特别可用于加入环氧化物以形成可用于制备前列腺素的ω侧链的乙烯基锡中间体。