HERON rearrangement of N,N?-diacyl-N,N?-dialkoxyhydrazines ? a theoretical and experimental study
摘要:
Ab initio calculations at the B3LYP/6-31G* level on N-methoxy-N-dimethylaminoformamide and its rearrangement to methyl formate and 1,1-dimethyldiazene through the HERON reaction, have been carried out in conjunction with an experimental study of the HERON reactions of N,N'-diacyl-N,N'-dialkoxyhydrazines. Substituent effects are in accord with the theoretical properties of the transition state and point to an anomerically driven process in which donor groups on the anomeric nitrogen and withdrawing groups on the migrating alkoxy oxygen facilitate the rearrangement process. (C) 1999 Elsevier Science Ltd. All rights reserved.
A new reaction mechanism for the Lossenrearrangement of hydroxamic acids catalyzed by basic salts is presented. It is shown that the rearrangement proceeds in metal complexes of deprotonated hydroxamic acids. The deprotonation can occur either at the oxygen atom (observed for the zinc complexes) or at the nitrogen atom (observed for the potassium complexes). Both anionic forms are characterized by
Campbell, John J.; Glover, Stephen A.; Hammond, Gerard P., Journal of the Chemical Society. Perkin transactions II, 1991, # 12, p. 2067 - 2080
作者:Campbell, John J.、Glover, Stephen A.、Hammond, Gerard P.、Rowbottom, Colleen A.
DOI:——
日期:——
Regio-Selective Formation of<i>O</i>-Acyl/<i>O</i>-Benzoyl Hydroxamates by Using a Polymer Supported Reagent Strategy
作者:A. S. Burungule、S. P. Bondge、S. B. Munde、V. E. Bhingolikar、R. A. Mane
DOI:10.1081/scc-120020206
日期:2003.6
Rapid, quantitative and regioselective O-acylation/O-benzoylation of hydroxamic acids has been carried using polymer supported hydroxamate anions and acetyl/benzoyl chloride under mild conditions. The isolation of unambiguous and pure products by simple work-up is also an important feature of this method.
Preparation of Some Alkyl-Substituted Monohydroxamic Acids, N-Acyl-O-alkylhydroxylamines. I
作者:JAMES H. COOLEY、WILLIAM D. BILLS、JAMES R. THROCKMORTON
DOI:10.1021/jo01080a014
日期:1960.10
Buccigross, Jeanne M.; Glover, Stephen A.; Hammond, Gerard P., Australian Journal of Chemistry, 1995, vol. 48, # 2, p. 353 - 362
作者:Buccigross, Jeanne M.、Glover, Stephen A.、Hammond, Gerard P.、Rowbottom, Colleen A.