PROBLEM TO BE SOLVED: To provide an inhibitor of cytochrome P450 monooxygenase, and intermediates involved.SOLUTION: The invention currently provides improved synthetic methods and intermediates that can be used to prepare the compound represented by formula I and its salts. The invention also provides improved methods for preparing intermediate compounds that can be used to prepare the compound of formula I and its salts. The improved methods and intermediates may reduce the cost, time and/or amount of waste associated with existing methods for preparing the compound of formula I and its salts.SELECTED DRAWING: None【課題】チトクロームP450モノオキシゲナーゼの阻害剤及びそれに関わる中間体の提供。【解決手段】現在、式Iで表される化合物及びその塩を調製するために使用できる改良された合成方法及び中間体。亦、式Iの化合物及びその塩を調製するために使用できる中間体化合物を調製するための改良法。該改良法及び中間体は、式Iの化合物及びその塩を調製するための既存の方法に関連するコスト、時間及び/又は廃棄物の量を減少させ得る合成方法。【選択図】なし