PROBLEM TO BE SOLVED: To provide a crystalline aryl alkylamine compound which has an activation effect on a calcium-sensing receptor (CaSR) and is useful as a medicine, especially a preventive or therapeutic medicine for hyperparathyroidism or the like and to provide a method for producing the same.SOLUTION: There is provided a method for producing a crystal of a dihydrochloride compound of 4-(3S-(1R-(1-naphthyl)ethylamino)pyrrolidine-1-yl)phenylacetic acid represented by the formula (7) using a compound represented by the formula (4) or a salt thereof.COPYRIGHT: (C)2015,JPO&INPIT【課題】カルシウム感受性受容体(CaSR)に対する活性化作用を有し、医薬、特に副甲状腺機能亢進症等の予防又は治療薬として有用な結晶性アリールアルキルアミン化合物及びその製造方法の提供。【解決手段】式(4)で表される化合物又はその塩を用いて式(7)で表される4-(3S-(1R-(1-ナフチル)エチルアミノ)ピロリジン-1-イル)フェニル酢酸の2塩酸塩化合物の結晶を製造する方法。【選択図】なし
