축합6환화합물및그의제조방법

Abstract

본 발명은 식(2)로 표시되는 화합물을 메탄술폰산으로 처리한 후, 재결정하여 식(1) 로 표시되는 화합물의 제조방법 및 이렇게 얻어진 화합물(1)을 개시한다. 본 화합물(1)은 흡습하지 않고, 여과성 및 용해성이 우수하고, 취급이 용이하다. 더욱이 본 발명의 제조방법에 따라 불필요한 이성체를 목적 이성체로 변환시킬 수 있고, 재결정함으로써 목적물을 쉽게 분리할 수 있다.
Disclosed are a process for the preparation of a compound represented by the formula (1), which comprises treating a compound represented by the formula (2) with methanesulfonic acid and then subjecting the thus-treated compound to recrystallization; and Compound (1) so obtained. <CHEM> This Compound (1) is free of hygroscopicity, excellent in filterability and solubility and easy in handling. Furthermore, according to the preparation process of the present invention, an unnecessary isomer can be converted into the target one and separation of the target isomer can be conducted easily.

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