Process for the preparation and purification of valgancyclovir
    1.
    发明申请
    Process for the preparation and purification of valgancyclovir 有权
    制备和纯化valgancyclovir的方法

    公开(公告)号:US20080076923A1

    公开(公告)日:2008-03-27

    申请号:US11820724

    申请日:2007-06-20

    IPC分类号: C07D473/18

    CPC分类号: C07D473/18

    摘要: A process for the preparation of valgancyclovir which comprises: a) reacting a compound of formula 7, in an aprotic solvent, in the presence of a condensing agent, with a compound of formula 8, wherein R1, and R2 may be, each independently, hydrogen, an halogen atom or an hydroxyl group; the double bond may either be in the E or Z configuration or a mixture thereof to yield a compound of formula 9 b) mild hydrolysis of compound obtained in a) to give valgancyclovir.

    摘要翻译: 一种制备valgancyclovir的方法,其包括:a)使式7的化合物在非质子传递溶剂中,在缩合剂存在下与式8的化合物反应,其中R 1, 和R 2可以各自独立地为氢,卤素原子或羟基; 双键可以是E或Z构型或其混合物,得到式9的化合物b)在a)中获得的化合物的温和水解得到valgancyclovir。

    Process for the preparation and purification of valgancyclovir hydrochloride
    2.
    发明授权
    Process for the preparation and purification of valgancyclovir hydrochloride 有权
    盐酸伐昔洛韦的制备和纯化方法

    公开(公告)号:US07935818B2

    公开(公告)日:2011-05-03

    申请号:US11820724

    申请日:2007-06-20

    IPC分类号: C07D473/18

    CPC分类号: C07D473/18

    摘要: A process for the preparation of valgancyclovir which comprises: a) reacting a compound of formula 7, in an aprotic solvent, in the presence of a condensing agent, with a compound of formula 8, wherein R1, and R2 may be, each independently, hydrogen, an halogen atom or an hydroxyl group; the double bond may either be in the E or Z configuration or a mixture thereof to yield a compound of formula 9 b) mild hydrolysis of compound obtained in a) to give valgancyclovir.

    摘要翻译: 制备valgancyclovir的方法,其包括:a)使式7的化合物在非质子溶剂中在缩合剂存在下与式8的化合物反应,其中R 1和R 2可以各自独立地为氢, 氢,卤素原子或羟基; 双键可以是E或Z构型或其混合物,得到式9的化合物b)在a)中获得的化合物的温和水解得到valgancyclovir。

    PROCESS FOR THE PREPARATION OF ROTIGOTINE
    3.
    发明申请
    PROCESS FOR THE PREPARATION OF ROTIGOTINE 有权
    制备罗哌卡因的方法

    公开(公告)号:US20110230541A1

    公开(公告)日:2011-09-22

    申请号:US13120682

    申请日:2009-09-24

    摘要: A process for the preparation of Rotigotine (I) and of pharmaceutically acceptable salts thereof, which comprises the reductive amination of an amine of formula 6 with the 2-thienylacetic acid-sodium boron hydride complex and which makes use of hydrobromide 5 as an intermediate (II) The process is advantageous from the industrial point of view in that it allows to obtain Rotigotine with high enantiomeric purity starting from optically active 5,6,7,8-tetrahydro-6-(S)-N-propylamino-1-methoxy-naphthalene (2), avoiding the use of dangerous reactives, the need for difficult chromatographic separation or the formation of by-products. Furthermore, two novel crystalline forms are disclosed.

    摘要翻译: 制备罗替戈汀(I)及其药学上可接受的盐的方法,其包括用2-噻吩基乙酸 - 硼氢化钠络合物还原胺化式6的胺并使用氢溴酸盐5作为中间体( II)该方法从工业观点来看是有利的,因为它允许从光学活性的5,6,7,8-四氢-6-(S)-N-丙基氨基-1-甲氧基,得到具有高对映体纯度的罗替高汀 - 萘(2),避免使用危险的反应物,难以进行层析分离或形成副产物。 此外,公开了两种新的结晶形式。