申请人:Voslar Michal
公开号:US20100105919A1
公开(公告)日:2010-04-29
In the preparation of zolmitriptan of formula III the reduction of the diazonium salt to (5)-4-(4-hydrazinobenzyl)-1,3-oxazolidin-2-one of formula IV is performed in a more concentrated mixture and by the effect on an alkali metal disulphite, preferably sodium disulphite. A zolmitriptan toluene solvate, characterized by a toluene content of 9 to 14% by weight according to the gas chromatography determination and by a maximum of the corresponding mass loss at temperatures of about 111° C. in the gravimetric analysis record. A zolmitriptan toluene solvate, showing strong Raman bands at the wave numbers of 1443 and 1354 cm
−
1, characteristic for the crystal lattice of zolmitriptan with built-in toluene, and further marked bands at 1004 and 786 cm
−
1, characteristic for toluene.
在制备化学式III的左米曲普坦时,将重氮盐还原为化学式IV的(5)-4-(4-肼基苯甲基)-1,3-噁唑烷-2-酮的过程中,使用更浓缩的混合物,并通过对碱金属二硫代硫酸盐(优选为亚硫酸钠)的作用进行。一种左米曲普坦甲苯溶剂结晶体,其甲苯含量根据气相色谱测定为9-14%的重量,并且在重量分析记录中在约111°C的温度下具有相应的最大质量损失。一种左米曲普坦甲苯溶剂结晶体,其拉曼光谱在1443和1354 cm^-1的波数处显示出强烈的特征性晶格振动带,表明其中含有甲苯,同时在1004和786 cm^-1处还有特征性的甲苯振动带。