A large number of alkyl 1, 2, 3, 4-tetrahydro-β-carboline-2-carbodithioates (2 and 5) with 3-hydroxycarbonyl and 3-hydroxymethyl groups were synthesized and tested for hepatoprotective activity against CCl4-induced liver damage in mice. Structure-activity relationships were investigated. Lengthening of the alkyl group in 2 and 5 tends to adversely affect the activity. Both enantiomers of the methyl derivatives (2a and 5a), the most potent compounds in this series, were synthesized, and no difference in hepatoprotective activity was observed. Apparent neighboring group participation was observed in the treatment of 5a with base or acid, giving the cyclized product (6) or the rearranged products (7, 8, and 9).
合成了大量含有3-羟基羰基和3-羟甲基的烷基1,2,3,4-四氢-β-咔啉-2-二
硫代
碳酸盐(2和5),并测试了它们对
CCl4诱导的小鼠肝损伤的肝保护活性。研究了结构-活性关系。2和5中烷基链的延长往往会不利地影响活性。合成了这一系列中最强的化合物——甲基衍
生物(2a和5a)的两种对映体,并观察到它们在肝保护活性上没有差异。用碱或酸处理5a时,可以观察到明显的邻位基团参与作用,生成了环化产物(6)或重排产物(7、8和9)。