Levocetirizine Dihydrochloride was prepared from benzoyl chloride by acidylation,hydrogenation,cyclization with an overall yield of 8.05%.
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- 以苯甲酰氯为原料;经酰化;还原;环合等反应合成左旋西替利嗪盐酸盐;反应总收率为8.;05%25。