Preparation and thermostability of phenazopyridine hydrochloride;
盐酸非那吡啶的合成及其热稳定性初步研究
p-chlorobenzyl) pyridine is prepared from 4-chlorobenzyl chloride and pyridine hydrochloride via condensation.
以对氯氯苄与盐酸吡啶缩合法制备 2 -对氯苄基吡啶 。
The intermediate 1-(4-pyridinio)pyridinium dichloride was synthesized by pyridine and sulphurous oxychloride,The yield was improved from 57%(literatures) to 65%.
由吡啶与氯化亚砜合成中间体双吡啶盐酸盐的收率从文献报道的57%提高到65%;由中间体与DM F合成目标化合物的收率从文献报道的53%提高到73%。