Molecular modeling show deviations in the orientation of the accessory phenyl ring between 4 and its ring expanded analogs 5 and 6. Furthermore, the additional methylene group in the azepine ring may cause an unfavorable steric intrusion into the receptor binding process. These conformational differences suggest that the placement of the accessory phenyl ring must be well defined.
为了评估靶向 D1
多巴胺受体的激动剂
配体的 β-取代基的构象和位置的重要性,(±)-trans-6,6a,7,8,13,13a-六氢苯并[e]chromeno [3,4 -b]azepine-2,3-diol 5 和 (±)-trans-6,6a,7,8,9,13b-hexahydrobenzo[d]chromeno[3,4b]azepine-2,3-diol 6 合成作为高亲和力 D1
多巴胺受体选择性激动剂多
黄嘌呤的扩环类似物,使用新型四氢苯并氮杂环形成策略。化合物 5 和 6 对 D1 受体仅有微摩尔亲和力。分子模型显示 4 及其扩环类似物 5 和 6 之间的辅助苯环的方向存在偏差。此外,氮杂环中的额外亚甲基可能导致对受体结合过程的不利空间侵入。