Published in
Elsevier, Tetrahedron Letters, 15(52), p. 1800-1803
DOI: 10.1016/j.tetlet.2011.02.028
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Cyclic products of the Ugi reaction of aldehydo and keto carboxylic acids: chemoselective modification
Journal article published in 2011 by
Alan Tsaloev,
Alexei Ilyin,
Sergey Tkachenko,
Alexandre Ivachtchenko,
Dmitry Kravchenko,
Mikhail Krasavin 
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Abstract
A method for the chemoselective reduction of Ugi-type lactam amides at the lactam carbonyl functionality with borane complexes has been developed. The novel reduction products can be further manipulated synthetically to yield various novel N- and C-terminally active unnatural amino acid building blocks.