activity. The homologous 1'-(CH2)nCOOH congeners also prove active, and there is a parabolic interrelationship between maximum increase in life span in L1210 tests and Rm values used as a measure of agent lipophilic--hydrophilic balance. The corresponding carboxamides [1'-(CH2)nCONH2] provide a similar parabolic relationship, which has an optimum Rm value displaced from that of the acids. Earlier examined
9-
苯胺基cr啶的简单
羧酸衍
生物(例如1,R = -COOH)具有很高的实验抗白血病(L1210)活性。同源的1'-(
CH2)nCOOH同系物也被证明具有活性,并且L1210试验中寿命的最大增长与用作衡量亲脂性-亲
水性平衡剂的Rm值之间存在抛物线关系。相应的羧酰胺[1'-( )nCONH2]具有相似的抛物线关系,具有最佳的Rm值,与酸的值相比有所偏离。较早检查的1'-NHSO2( )nCH3变体,它们的3-NHCOCH3同系物以及羧酰胺[1'-( )nCONH2]和磺酰胺[1'-( )nSO2NH2]同源物可被视为一组得到的相关方程与仅羧酰胺变体的相关方程相同。该组的最佳Rm值与酸的最佳Rm值相等于
辛醇-
水规模的1.8 log P单位。在该药物系列中,
羧酸残基充当可接受的亲
水性单元,在未电离的酸和完全电离的
羧酸根阴离子之间提供log P贡献中间值。在含有
羧酸或链烷磺酰胺侧链