The present invention relates generally to novel methods for the synthesis of O-(6-pyrazol-1-yl-pyridin-3-ylmethyl)-hydroxylamine which is an essential reagent in the synthesis of one of the bridged erythromycin derivatives and their respective pharmaceutically acceptable salts in PCT Application WO 03/097659 A1. In particular, the present invention relates to processes and intermediates for the preparation of a compound of formula (Ia):
本发明涉及一种合成O-(6-
吡唑-1-基-
吡啶-3-基甲基)-
羟胺的新方法,该化合物是桥式
红霉素衍
生物及其相应药用盐合物的合成中必需的试剂,该合成过程在
PCT申请WO 03/097659 A1中有所描述。具体而言,本发明涉及制备式(Ia)化合物的方法和中间体: