Journal
CHINESE CHEMICAL LETTERS
Volume 18, Issue 12, Pages 1469-1470Publisher
CHINESE CHEMICAL SOC
DOI: 10.1016/j.cclet.2007.10.019
Keywords
vicinal diamine; benzotriazole; glyoxal; Mannich reaction; synthesis
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A practical synthesis of symmetrical vicinal diamines with broad chemistry scope is described. The key step is the ultrasonicwave promoted tandem-reaction, two-step reaction sequence combining Mannich double condensations with benzotriazole, glyoxal and primary or secondary amines and reduction of the bis(benzotriazole)-adducts with sodium borohydride proceeded smoothly in tetrahydrofuran in high yield at room temperature. (c) 2007 Wen Pei. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
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