As part of our program toward designing potassiumchannelopeners, the synthesis of a novel series of substituted benzanilides and their vasodilating activity are presented. The facile synthetic pathway generally involves coupling between the appropriate benzoyl chloride and commercial available anilines, followed by the selective or non-selective cleavage of methyl ether substituent(s), affording
ligands, N-(2-hydroxyphenyl)salicylamide (H3L1) and its homologues with a substituent on the 2-hydroxyphenyl moiety (5-Me, H3L2; 5-Cl, H3L3; 4-NO2, H3L4; 5-NO2, H3L5), were utilized for the synthesis of cobaltcomplexes. The ligands H3L1 and H3L2 gave uncharacterized substances when treated with a cobalt(II) salt, whereas H3L3—H3L5 formed cobalt(III) complexes of general formula K3[CoL2.] The cobalt(III)
三齿三阴离子螯合配体,N-(2-羟苯基)水杨酰胺(H 3 L 1)及其在2-羟苯基部分上具有取代基的同系物(5-Me,H 3 L 2; 5-Cl,H 3 L 3;和-)。用4-NO 2,H 3 L 4; 5-NO 2,H 3 L 5)合成钴配合物。当用钴(II)盐处理时,配体H 3 L 1和H 3 L 2产生未表征的物质,而H 3大号3 -H 3大号5形成钴(III)通式的K复合物3 [COL 2。]钴(III)配合物通过元素分析,热重分析,电子光谱,和循环伏安表征。循环伏安图显示了两个电势极低的氧化还原对,它们基于控制电势电解和esr研究被分配给Co IV –Co III和Co V –Co IV氧化还原过程。钴(III)配合物易于化学氧化(与I 2)或电化学的钴(IV)配合物,其被确定由邻近的ESR信号克= 2.0与八线超精细结构(甲AV。 = 0.00192厘米-1)。