1,2,4,5-benzoylenebis(naphtho[1,8-de]pyrimidine) compounds and their use
申请人:SHARP KABUSHIKI KAISHA
公开号:EP0349219A1
公开(公告)日:1990-01-03
1,2,4,5-Benzoylenebis(naphto [1,8-de] pyrimidine) compounds of the following formula (I) or (II):
wherein R and R′ are, the same or different, hydrogen atom, a halogen atom, hydroxyl group, nitro group, cyano group, an alkyl group which may be substituted, an alkoxyl group which may be substituted, an aryl group which may be substituted, an aralkyl group which may be substituted, a carboxyl group which may be esterified or a carbamoyl group which may be substituted and m and n each are an integer from 1 to 6, and photosensitive members for electrophotography having a photosensitive layer containing them.
Heterocyclic amidines and guanidines have been tested as RNA cleaving catalysts, which led to the identification of potent candidates. Besides pKa values and steric effects, the energy difference between tautomeric forms seems to be one of the relevant parameters, accessible by computational methods on different levels of sophistication. The fast semi-empirical AM1-method was found sufficient to provide
杂环脒和胍已作为 RNA 裂解催化剂进行了测试,从而确定了有效的候选物。除了 p K a值和空间效应外,互变异构形式之间的能量差异似乎是相关参数之一,可通过不同复杂程度的计算方法获得。发现快速半经验 AM1 方法足以提供相应趋势的定性到半定量估计。
HOUNSHELL W. D.; ANET F. A. L.; COZZI F.; DAMEWOOD J. R.; JOHNSON C. A. J+, J. AMER. CHEM. SOC., 1980, 102, NO 18, 5941-5942
作者:HOUNSHELL W. D.、 ANET F. A. L.、 COZZI F.、 DAMEWOOD J. R.、 JOHNSON C. A. J+