Highly pure phenothiazine compound, production method thereof, production method of intermediate therefor, and hydrate and novel crystal as starting materials for the intermediate
申请人:Sumika Fine Chemicals Co., Ltd.
公开号:US06433168B1
公开(公告)日:2002-08-13
According to the method of the present invention, an alkali metal compound, dimethyl sulfoxide, trimethyloxosulfonium halide and 3-quinuclidinone are added in a specific order to give the following compound [II]. This compound is, without treatment or isolation, directly reacted with an alkali metal salt of phenothiazine to give the following compound [III], from which the following compound [I] is obtained. During the production of compound [I], a by-produced acidic gas is removed and water is added to ensure industrial, safe and efficient production of compound [I] at a constantly high yield. Inasmuch as the present invention enables production of the following highly pure compound [A] by eliminating hydrogen halide of compound [I] in glyme in the presence of at least one kind of a base selected from potassium hydroxide and potassium alkoxide, compound [A] having a high purity of not less than 85 mol % can be provided.
根据本发明的方法,按特定顺序加入碱金属化合物、二甲基亚砜、三甲氧硫代铵卤化物和3-喹啉酮,得到以下化合物【II】。这种化合物直接与苯并噻嗪的碱金属盐反应,得到以下化合物【III】,从中得到化合物【I】。在生产化合物【I】的过程中,除去产生的酸性气体并加入水,确保在不断高产率下工业化、安全和高效地生产化合物【I】。由于本发明能够通过在甘油醚中消除化合物【I】的氢卤酸,以及在存在氢氧化钾和钾烷氧化物中至少选择一种碱的情况下得到以下高纯度的化合物【A】,化合物【A】的纯度不低于85摩尔%。