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US07919627B2 Processes for the preparation of hydroxylamines 失效
制备羟胺的方法

Processes for the preparation of hydroxylamines
摘要:
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):
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