Thermal rearrangement of α-hydroxy imines with an α-allyl or an α-propargyl substituent
作者:Jean-Michel Vatele、Daniel Dumas、Jacques Gore
DOI:10.1016/0040-4039(90)80205-z
日期:1990.1
In refluxing diglyme, the title α-hydroxy imines and rearrange cleanly to amino ketones and substituted on the carbon α to nitrogen by an allyl or a propargyl group. In the case of α-hydroxy imine , the migration of the allyl group occurs with an allylic transposition.
A facile claisen rearrangement involving the transient tautomeric enamine forms of α-allyloxy and α-propargyloxyimines
作者:Didier Desmae¨le、Nicolas Champion
DOI:10.1016/s0040-4039(00)60106-5
日期:1992.7
α-Allyloxyimines rearrange smoothly to 2-amino-2-allyl-ketones by heating at 80°C for few hours, by Claisen rearrangement of the tautomeric secondary enamine. Similarly α-propargyloxyimine gave 2-amino-2-allenylketones. By consrast, 2-benzyloxyimines afford rearranged 2-amino-2-benzyloxycyclopentanone by [1,3] sigmatropic shift.