申请人:Miles Laboratories, Inc.
公开号:US03953604A1
公开(公告)日:1976-04-27
Definitions: in the following Formulae I, II and IV, R.sup.1 represents hydrogen, alkyl of 1 to 4 carbon atoms, or a nontoxic cation, while each of R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6 symbolizes hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, carboxy, carbalkoxy of 1 to 4 carbon atoms, trihalomethyl, halogen, nitro or cyano. Certain 1-(2-substituted-chromon-yloxy)-2-hydroxy-3-(substituted-phenoxy)propanes (Formula I), ##SPC1## can be synthesized from intermediate bis-(substituted-phenoxy)propanes (Formula II), ##SPC2## by condensation with diethyl oxalate in the presence of sodium ethoxide followed by cyclization with a mixture of glacial acetic acid and concentrated sulfuric or a mixture of concentrated hydrochloric acid and a lower alcohol containing up to 4 carbon atoms. The bis-(substituted-phenoxy)propane intermediates (Formula II) are prepared by reacting a dihydroxyacetophenone (Formula III), ##SPC3## with a (substituted-phenyl)glycidyl ether (Formula IV), ##SPC4## in an organic solvent in the presence of a catalyst. The 1-(2-substituted-chromon-yloxy)-2-hydroxy-3-(substituted-phenoxy)propanes (Formula I) are useful in the treatment of allergic conditions in mammals. The bis-(substituted-phenoxy)propanes (Formula II) are useful as intermediates in the synthesis of the latter compounds. Methods of preparing compounds having Formulae I and II are described. Methods of treating allergic conditions in mammals utilizing compounds of Formula I are also disclosed.
在以下公式中,I、II和IV,R.sup.1代表氢、1至4个碳原子的烷基,或者是无毒阳离子,而R.sup.2、R.sup.3、R.sup.4、R.sup.5和R.sup.6分别表示氢、1至4个碳原子的烷基、1至4个碳原子的烷氧基、羧基、1至4个碳原子的羧烷氧基、三卤甲基、卤素、硝基或氰基。某些1-(2-取代-咖啡因氧基)-2-羟基-3-(取代-苯氧基)丙烷(公式I)可以通过中间体双-(取代-苯氧基)丙烷(公式II)与草酸二乙酯在乙醇钠存在下缩合,然后在冰乙酸和浓硫酸或浓盐酸和含有最多4个碳原子的低碳醇的混合物存在下环化来合成,双-(取代-苯氧基)丙烷中间体(公式II)通过在有机溶剂中与催化剂一起反应的双羟基苯乙酮(公式III)与(取代-苯基)环氧乙烷(公式IV)反应来制备。1-(2-取代-咖啡因氧基)-2-羟基-3-(取代-苯氧基)丙烷(公式I)在治疗哺乳动物的过敏症状中很有用。双-(取代-苯氧基)丙烷(公式II)在合成后者化合物中的中间体中很有用。描述了制备具有公式I和II的化合物的方法。还公开了利用公式I化合物治疗哺乳动物过敏症状的方法。