标题: 求助 [打印本页] 作者: ruifen0829 时间: 6.6.2005 09:32
我是药学专业学生，哪位帮忙翻译以下文献，多谢！<br /><br />From 1000ml 40proz. Aqueous Dimethylamin becomes by addition of 50g firm KOH, Turn up to the complete solution, Addition of Siedesteihen and careful warming up the pure Dimethylamin more uber a Rueckflusskuehler(Leitungswasser), by a PL hose and a KOH drying tower in one with dry iceMethanol cooled piston kondesiert. liquefied amine tartaric acid dia. ethyl esters in 600ml become abs into a solution of 618g(3mol). Methanol poured and at least 3 days with blank. in the refrigerator over night large quantities separate more colorless, crude crystals off, to be abgenutscht and with -30° to cold methanol be washed. From the filtrate one receives further product by restricting. The collected Kristallisate becomes i. with 70-100° dried. So the product received in 95-98% (570-580g) yield is for the subsequent treatment purely enough.<br />