Synthesis of β-Amino Esters via Aza-Michael Addition of Amines to Alkenes Promoted on Silica: A Useful and Recyclable Surface
作者:Basudeb Basu、Pralay Das、Ismail Hossain
DOI:10.1055/s-2004-834836
日期:——
A solvent-free protocol for the synthesis of β-amino esters and nitriles has been developed via conjugate addition of amines to electron-deficient alkenes promoted on silica. The silica surface may be recycled. Both aliphatic and aromatic primary or secondary amines worked efficiently to yield the desired adducts in good to excellent yields.
A convenient synthesis of secondary hydroxylamines
作者:Ian A O'Neil、Ed Cleator、David J Tapolczay
DOI:10.1016/s0040-4039(01)01745-2
日期:2001.11
The oxidation of a range of β-cyanoethyl tertiary amines with mCPBA gives the corresponding N-oxides, which can be isolated or undergo Cope-elimination to give secondary hydroxylamines in excellent yield.
The synthesis of functionalised chiral bicyclic lactam and lactone N-oxides using a tandem Cope elimination/reverse Cope elimination protocol
作者:Gemma L. Ellis、Ian A. O’Neil、V. Elena Ramos、Ed Cleator、S. Barret Kalindjian、Alan P. Chorlton、David J. Tapolczay
DOI:10.1016/j.tetlet.2007.01.045
日期:2007.3
derivatives of (S)-proline and (R)-pipecolic acid have been prepared using a Copeelimination. These undergo reverse Copeelimination onto a pendant double bond to give bicyclic lactam and lactone N-oxides containing three contiguous chiral centres, this extends the scope and applicability of the reverse Copeelimination in the synthesis of heterocyclic systems by incorporation of the lactone and lactam