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Processes for making hydrazides
专利权人:
发明人:
George Anello Chiarello,Ayman Sahli
申请号:
US14973869
公开号:
US09738602B2
申请日:
2015.12.18
申请国别(地区):
US
年份:
2017
代理人:
摘要:
A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.
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