期刊
TETRAHEDRON LETTERS
卷 52, 期 3, 页码 369-372出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2010.10.169
关键词
Weinreb amides; Calorimetric changes; Amidation; Water-soluble by-products; COMU (R)
资金
- SWAN Alliance
The use of CUM, as a non-hazardous partner, in the coupling of N-protected alpha-amino acids to N-methoxy-N-methylamine to afford the corresponding Weinreb amides is discussed. From a practical point of view the reaction can be monitored visually by virtue of the colour change associated with the conversion of substrates (yellow) into the products (orange). As the by-products of the reaction are conveniently water-soluble the products are isolated relatively pure and with minimal racemisation. These factors coupled with the short reaction time make this a very useful procedure. (c) 2010 Published by Elsevier Ltd.
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