Abstract
The preparations of novel phosphodiesterase inhibitors, 8-acetoxy-5-iodo-6-methoxypy rido[3,4-b]indole, 5,7-dibromo-6-hydroxypyrido[3,4-b]indole, 5,7-dichloro-6-hydroxypyrido[3,4-b]-indole and 8-acetoxy-5-bromo-6-methoxypyrido[3,4-b]indole, are described together with concentrations giving 50% inhibition against cyclic AMP phosphodiesterase, i.e. 3 × 10−6, 3 × 10−6, 7 × 10−6 and 1 × 10−5 M, respectively. The relative potency of these eudistomin derivatives is discussed in terms of the chemical structures compared with those of other inactive eudistomins and derivatives.
摘要 描述了新型磷酸二酯酶抑制剂的制备,包括8-乙酰氧基-5-碘-6-甲氧基吡咯[3,4-b]吲哚、5,7-二溴-6-羟基吡咯[3,4-b]吲哚、5,7-二氯-6-羟基吡咯[3,4-b]-吲哚和8-乙酰氧基-5-溴-6-甲氧基吡咯[3,4-b]吲哚,以及对环磷酸腺苷磷酸二酯酶产生50%的抑制浓度,即分别为3×10−6、3×10−6、7×10−6和1×10−5 M。通过与其他无活性的欧地菲啶及其衍生物的化学结构进行比较,讨论了这些欧地菲啶衍生物的相对效力。