Anisole derivatives
    2.
    发明授权
    Anisole derivatives 失效
    苯甲醚衍生物

    公开(公告)号:US4746747A

    公开(公告)日:1988-05-24

    申请号:US901367

    申请日:1986-08-28

    摘要: There is provided a novel anisole derivative represented by the following formula (I): ##STR1## wherein A to D are defined as follows: (1) A, B and C are each a hydrogen atom, and D represents --OH, a halogen atom, --CO.sub.2 R.sup.1 of which R.sup.1 represents a lower alkyl group, --SO.sub.2 R.sup.2 of which R.sup.2 represents a lower alkyl group, or ##STR2## or (2) A and C are each a hydrogen atom, B is --OH, and D represents --CO.sub.2 R.sup.3 of which R.sup.3 represents a lower alkyl group; or(3) A is a hydrogen atom, B and C form an oxo group .dbd.O together, and D represents --CO.sub.2 R.sup.4 of which R.sup.4 represents a lower alkyl group; or(4) B and C are each a hydrogen atom, D is a halogen atom, and A represents --CHO.

    摘要翻译: 提供由下式(I)表示的新型苯甲醚衍生物:其中A至D定义如下:(1)A,B和C各自为氢原子,D表示-OH ,卤素原子,其中R 1表示低级烷基的-CO 2 R 1,其中R 2表示低级烷基的-SO 2 R 2,或(2)A和C各自为氢原子,B为-OH,和 D表示其中R 3表示低级烷基的-CO 2 R 3; 或(3)A是氢原子,B和C一起形成氧代基= O,D表示-CO 2 R 4,其中R4代表低级烷基; 或(4)B和C各自为氢原子,D为卤素原子,A为-CHO。

    Process for preparing cotarnine
    4.
    发明授权
    Process for preparing cotarnine 失效
    制备苯胺的方法

    公开(公告)号:US4963684A

    公开(公告)日:1990-10-16

    申请号:US307247

    申请日:1989-02-07

    IPC分类号: C07D491/04 C07D491/056

    CPC分类号: C07D491/04

    摘要: A process for preparing cotarnine is provided which comprises oxidizing the amino group of a tetrahydroisoquinoline compound represented by the following formula (I): ##STR1## to convert said compound into a dihydroisoquinolinium salt represented by the following formula (II): ##STR2## wherein A.sup.- represents an anion, and then hydrolyzing said dihydroisoquinolinium salt.

    摘要翻译: 提供了一种制备丁酸的方法,其包括将由下式(I)表示的四氢异喹啉化合物的氨基氧化为:将所述化合物转化为由下式(II)表示的二氢异喹啉鎓盐: (II)其中A-表示阴离子,然后水解所述二氢异喹啉鎓盐。

    Method for producing 2,4-dihydroxyquinoline derivatives
    5.
    发明授权
    Method for producing 2,4-dihydroxyquinoline derivatives 失效
    2,4-二羟基喹啉衍生物的制备方法

    公开(公告)号:US4904787A

    公开(公告)日:1990-02-27

    申请号:US177045

    申请日:1988-04-04

    IPC分类号: C07D215/22 C07D491/052

    CPC分类号: C07D215/22

    摘要: A method for producing a 2,4-dihydroxyquinoline derivative of the formula: ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is a hydrogen atom, a lower alkyl group, a lower alkoxy group or a halogen atom, and its tautomer, which comprises cyclizing an aryl malonic acid amide ester derivative of the formula: ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined above, and R.sup.5 is a lower alkyl group, by means of polyphosphoric acid.