Squarylium compounds, and processes and intermediates for the synthesis of these compounds
    8.
    发明授权
    Squarylium compounds, and processes and intermediates for the synthesis of these compounds 失效
    方酸化合物,以及用于合成这些化合物的方法和中间体

    公开(公告)号:US06482950B1

    公开(公告)日:2002-11-19

    申请号:US08479077

    申请日:1995-06-06

    IPC分类号: C07D47100

    摘要: Squarylium compounds of the formula: wherein Q1 and Q2 are each independently a pyrylium, thiopyrylium, selenopyrylium, benzpyrylium, benzthiopyrylium or benzselenopyrylium nucleus, and R1 and R2 are each independently an aliphatic or cycloaliphatic group, can be prepared by reacting a squaric acid derivative of the formula: with a compound of the formula Q2CH2R2 in the presence of a base. The derivatives of Formula II may be prepared by condensing a 2,3,4,4-tetrahalocyclobut-2-en-1-one with a compound of the formula Q1CH2R1 in the presence of a base to produce a compound of the formula: wherein Q1 and R1 are as defined above, and X represents chlorine or bromine, and hydrolyzing the compound of Formula III. Alternatively, the derivatives of Formula II may be prepared by reacting a diester, monoacid chloride monoester or diacid chloride of squaric acid with a compound of the formula Q1CH2R1 in the presence of a base, followed by hydrolysis of the resultant monoacid chloride or monoester derivative of the compound of Formula II to the parent compound.

    摘要翻译: 下式的方酸化合物:其中Q1和Q2各自独立地是吡喃鎓,硫代吡喃鎓,硒代吡喃鎓,苯并吡喃鎓,苯并硫代吡喃鎓或苯并硒吡喃鎓核,R1和R2各自独立地是脂族或脂环族基团,可以通过将 式中:在碱的存在下使用式Q2CH2R2的化合物。 式II的衍生物可以通过在碱的存在下将2,3,4,4-四卤代环丁-2-烯-1-酮与式Q1CH2R1的化合物缩合来制备下式的化合物:其中 Q1和R1如上定义,X​​表示氯或溴,并水解式III化合物。 或者,式II的衍生物可以通过在碱的存在下使方酸的二酯,单酰氯单酯或二酸氯化物与式Q1CH2R1的化合物反应制备,然后水解所得的单酰氯或单酯衍生物 式II化合物与母体化合物。