The present invention partly provides the compound and its pharmaceutically acceptable salt of Formulas I; Preparation method and prepare intermediate; With the composition comprising this kind of compound or salt; And its purposes in (or D1- is relevant) obstacle that treatment D1- is mediated, the obstacle includes, such as schizophrenia (such as its cognition and negative symptoms), cognitive impairment (such as cognitive impairment relevant to schizophrenia, AD, PD or medicinal treatment), age-related cognitive decline, dementia and Parkinson's disease.本發明部分地提供式I的化合物及其藥學上可接受的鹽;其製備方法和製備中間體;和包含這類化合物或鹽的組合物;及其在治療D1-介導的(或D1-相關的)障礙中的用途,所述障礙包括,例如精神分裂症(例如其認知和陰性症狀)、認知缺損(例如與精神分裂症、AD、PD或藥物療法相關的相關的認知缺損)、與年齡相關的認知衰退、癡呆和帕金森氏病。