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    • 93. 发明授权
    • Process for preparation of glycidyl ether
    • 缩水甘油醚的制备方法
    • US5359097A
    • 1994-10-25
    • US571543
    • 1990-08-22
    • Kiyoshi KawamuraTomio Ota
    • Kiyoshi KawamuraTomio Ota
    • C07D301/28C07D303/22C07D405/12C07D407/12C07D417/12C07D311/04
    • C07D303/22C07D407/12
    • A process is provided for preparation of a glycidyl ether represented by the general formula ##STR1## wherein A represents an aryl group optionally having a substituent or a heteroaryl group optionally having a substituent, and the carbon atom marked with * is an asymmetric carbon,which comprises reacting an aryl alcohol represented by the general formulaA--OH (I)wherein A is as defined above,with an epihalohydrin in the presence of a quaternary ammonium salt; and, if necessary, further treating the reaction product with a base. According to the present process, it is possible to prepare by simple procedures and in a high optical purity glycidyl ethers of the above formula (II) useful as an intermediate for preparation of medicines, particularly medicines having .beta.-adrenoreceptor blocking action or the like.
    • PCT No.PCT / JP89 / 01293 Sec。 371 1990年7月18日第 102(e)日期1990年7月18日PCT提交1989年12月25日PCT公布。 出版物WO90 / 07506 日本1990年7月12日提供了一种制备由任选具有取代基的通式或由任选具有取代基的杂芳基表示的缩水甘油醚的方法,标有*的碳原子是不对称碳,其包括使 由季铵盐存在下的表卤代醇,由通式A-OH(I)表示的芳基醇,其中A如上所定义; 并且如果需要,用碱进一步处理反应产物。 根据本方法,可以通过简单的方法和上述式(II)的高光学纯度的缩水甘油醚制备,其可用作制备药物的中间体,特别是具有β-肾上腺素受体阻断作用的药物等。
    • 95. 发明授权
    • Phase transfer catalytic process for preparing intermediates of
atenolol, propranolol, and their derivatives
    • 用于制备阿替洛尔,普萘洛尔及其衍生物的中间体的相转移催化方法
    • US5290958A
    • 1994-03-01
    • US33047
    • 1993-08-18
    • Shyue-Ming JangTian-Shy Shieh
    • Shyue-Ming JangTian-Shy Shieh
    • C07C41/16C07D301/28C07D303/22C07C41/03C07C43/205C07D303/23
    • C07D303/22C07C41/16
    • A phase transfer catalytic process for the preparation of epoxide and halohydrin intermediates, which can be subsequently and directly reacted with isopropylamine to produce beta-adrenergic antagonists such as atenolol, propanolol and their derivatives. In the process disclosed in the present invention, quaternary ammonium salts of high alkyl groups or tertiary ammonium salts of lower alkyl groups are used as catalyst in the phase transfer catalytic oxygenated-alkylation reaction between an aromatic alcohol such as p-hydroxyphenyl acetamide (for the production of atenolol) or .alpha.-naphthol (for the production of propranolol) and epichlorohydrin to yield epoxide and halohydrin intermediates. The quaternary ammonium salts of high alkyl groups are represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are C.sub.1 to C.sub.20 alkyl groups and at least one of the R.sub.1, R.sub.2, R.sub.3, or R.sub.4 is a C.sub.9 to C.sub.20 alkyl group, and X is a halide group. And the tertiary ammonium salts of lower alkyl groups are presented by the following formula: ##STR2## wherein R.sub.5 is a C.sub.1 to C.sub.20 alkyl group, H is hydrogen, and X is a halide group.
    • 用于制备环氧化物和卤代醇中间体的相转移催化方法,其可以随后和异丙胺直接反应以产生β-肾上腺素能拮抗剂,例如阿替洛尔,丙酰洛伦及其衍生物。 在本发明公开的方法中,在芳基醇如对羟基苯基乙酰胺之间的相转移催化氧化 - 烷基化反应中使用高级烷基的季铵盐或低级烷基的叔铵盐作为​​催化剂(对于 产生阿替洛尔)或(α) - 萘酚(用于生产普萘洛尔)和表氯醇以产生环氧化物和卤代醇中间体。 高烷基的季铵盐由下式表示:(*化学结构*)其中R 1,R 2,R 3和R 4是C 1至C 20烷基和R 1,R 2,R 3或R 4中的至少一个 是C 9〜20烷基,X是卤化物基团。 低级烷基的叔铵盐由下式表示:(*化学结构*)其中R 5为C 1至C 20烷基,H为氢,X为卤化物基团。