Journal
TETRAHEDRON
Volume 63, Issue 45, Pages 10902-10913Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2007.08.085
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4-Alkoxy substituted 1,3,2-dioxaborinanes 1, readily available from b-keto esters, undergo substitution reactions under mild reaction conditions with primary and secondary amines, deriving the 4-alkylamino analogue 2. Reactions of 1 with substituted phenylhydrazines gave the corresponding hydrazones, or pyrazolones, and 5-alkoxy- 1H-pyrazoles as a mixture of products. (c) 2007 Elsevier Ltd. All rights reserved.
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