发明申请
US20120123125A1 Manufacturing process for tiotropium bromide 失效
噻托溴铵的制造工艺

Manufacturing process for tiotropium bromide
摘要:
The present invention relates to a novel manufacturing process of pharmaceutically active compound of formula I used as a long-acting anticholinergic bronchodilator. Starting from oxalic acid derivative of formula III the invention describes preparation of a novel cyclic anhydride of formula II which is very efficient precursor in the synthesis of Tiotropium bromide (compound of formula I).
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