Aza-Payne rearrangement of α,α-disubstituted-aziridinemethanols
摘要:
The aza-Payne rearrangement of activated N-Ts-alpha,alpha-disubstituted-aziridinemethanols, induced by NaOH in the mixed solvent (BuOH)-Bu-t/H2O/THF (4:5:1) or NaH in a mixed solvent of THF/HMPA (10: 1), as well as some N-Boc-alpha,alpha-disubstituted-aziridinemethanols with the latter reagent/solvent combination, provides the corresponding epoxides in up to 99% yield. (c) 2006 Elsevier Ltd. All rights reserved.
Lewis Acid-Mediated Rearrangement of Activated Cyclic Amines: A Facile Synthetic Protocol for the Preparation of Amino Carbonyl Compounds
作者:Sermadurai Selvakumar、Sivaraj Baktharaman、Vinod K. Singh
DOI:10.1021/jo702044k
日期:2007.12.1
Ring opening of activated cyclic amines to produce amino carbonyl compounds has been studied in the presence of Lewis acids. Whereas five- and six-membered rings cleave and rearrange via a 1,2-hydride shift, reaction in three- and four-membered rings takes place via a C−C bond migration. In the case of a three-membered ring, a wide variety of Lewis acids proved to be effective for the reaction. Base-induced
The Influence of Substituents on the Hydroxyl-Bearing Carbon in the Aza-Payne Rearrangement of Aziridinemethanols
作者:Wenjin Xu、Jun Zhang、Hao Guo、Qifeng Zhu、Xianming Hu
DOI:10.2174/157017809788681310
日期:2009.7.1
A new series of α,α-disubstituted aziridinemethanols have been synthesized and their aza-Payne rearrangement reactions were studied. The results show that α,α-disubstituted aziridinemethanols with electron-withdrawing groups accelerate the aza-Payne rearrangement than those with electron-donating groups. All of the rearrangements proceeded through an inversion of configuration at the C-2 carbon.
The aza-Payne rearrangement of activated N-Ts-alpha,alpha-disubstituted-aziridinemethanols, induced by NaOH in the mixed solvent (BuOH)-Bu-t/H2O/THF (4:5:1) or NaH in a mixed solvent of THF/HMPA (10: 1), as well as some N-Boc-alpha,alpha-disubstituted-aziridinemethanols with the latter reagent/solvent combination, provides the corresponding epoxides in up to 99% yield. (c) 2006 Elsevier Ltd. All rights reserved.