Enhancing Reductive Cleavage of Aromatic Carboxamides
摘要:
[GRAPHICS]A set of aromatic and especially heteroaromatic N-benzyl carboxamides, derived from naphthalene, pyridine, pyrazine, and quinoline, and the corresponding tert-butyl acylcarbamates have been synthesized and studied by cyclic voltammetry with respect to facilitated reduction. The latter undergo regiospecific cleavage of their C(O)-N bonds under very mild reductive conditions with formation of Boc-protected (benzyl)amine in most cases in nearly quantitative yields, Examples of preparative cleavage by controlled potential electrolysis, activated aluminum, and NaBH4 are given.
Enhancing Reductive Cleavage of Aromatic Carboxamides
作者:Ulf Ragnarsson、Leif Grehn、Hernani L. S. Maia、Luis S. Monteiro
DOI:10.1021/ol010072a
日期:2001.6.1
[GRAPHICS]A set of aromatic and especially heteroaromatic N-benzyl carboxamides, derived from naphthalene, pyridine, pyrazine, and quinoline, and the corresponding tert-butyl acylcarbamates have been synthesized and studied by cyclic voltammetry with respect to facilitated reduction. The latter undergo regiospecific cleavage of their C(O)-N bonds under very mild reductive conditions with formation of Boc-protected (benzyl)amine in most cases in nearly quantitative yields, Examples of preparative cleavage by controlled potential electrolysis, activated aluminum, and NaBH4 are given.
Reductive cleavage of N-substituted aromatic amides as tert-butyl acylcarbamatesElectronic supplementary information (ESI) available: reductive cleavage of N-substituted aromatic amides as tert-butyl acylcarbamates. See http://www.rsc.org/suppdata/p1/b1/b107330n/
作者:Ragnarsson, Ulf、Grehn, Leif、Maia, Hernani L.S.、Monteiro, Luis S.
DOI:10.1039/b107330n
日期:2002.12.17
N-benzyl carboxamides and in particular the corresponding tert-butyl acylcarbamates are reported. These compounds were required to study the postulated effect of various heterocycles (pyridine and pyrazine with and without condensed benzene rings) on the cleavage of acyl–N bonds by reduction. All compounds were initially characterized by cyclic voltammetry (CV) which indicated various degrees of facilitated