Easy and efficient synthesis of enantiomerically enriched 2H-azirines derived from phosphonates
摘要:
An efficient synthesis of 2H-azirines substituted with a phosphonate group is described. The key step is an alkaloid-mediated Neber reaction of beta-ketoxime tosylates. Reduction of 2H-azirines with sodium borohydride in ethanol gives 2-phosphorylated cis-aziridines. (C) 2000 Published by Elsevier Science Ltd.
Hetero-Diels–Alder Reaction of Phosphorylated Nitroso Alkenes with Enol Ethers on Water: A Clean Approach Toward 1,2-Oxazine Derivatives
作者:Jesús M. de los Santos、Roberto Ignacio、Zouhair Es Sbai、Domitila Aparicio、Francisco Palacios
DOI:10.1021/jo501339c
日期:2014.8.15
process, which involves a two-step sequence of reactions on-water, is a regioselective hetero-Diels–Alder cycloaddition reaction of enolethers to 4-phosphinyl or 4-phosphonyl nitroso alkenes mediated by water itself. The process has also been performed under solvent-free conditions and in organic solvents for comparison.
Easy and efficient synthesis of enantiomerically enriched 2H-azirines derived from phosphonates
作者:Francisco Palacios、Ana M Ochoa de Retana、José I Gil
DOI:10.1016/s0040-4039(00)00843-1
日期:2000.7
An efficient synthesis of 2H-azirines substituted with a phosphonate group is described. The key step is an alkaloid-mediated Neber reaction of beta-ketoxime tosylates. Reduction of 2H-azirines with sodium borohydride in ethanol gives 2-phosphorylated cis-aziridines. (C) 2000 Published by Elsevier Science Ltd.