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.
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.