Oxidative Synthesis of Cyclic Acyl Aminals through Carbon−Carbon σ-Bond Activation
摘要:
[GRAPHICS]Acyliminium ions can be prepared through photoinitiated single-electron oxidation reactions of homobenzylic amides and carbamates. Cyclic acyl aminals are formed when these acyliminium ions are appended to nucleophiles such as hydroxyl, ether, and sulfonamide groups. The scope of these reactions is discussed along with mechanistic issues relating to the energetics, chemoselectivity, and stereoelectronic effects of bond activation.
Aerobic Organocatalytic Photoinitiated Arene Oxidations: Application to Electron Transfer Initiated Cyclization Reactions
作者:V. Satish Kumar、Danielle L. Aubele、Paul E. Floreancig
DOI:10.1021/ol016996f
日期:2001.12.1
[reaction: see text] Electrontransfer initiated oxidative cyclization reactions can be effected by catalytic amounts of N-methylquinolinium hexafluorophosphate through photoirradiation in the presence of dioxygen. Solid sodium thiosulfate serves as an effective reducing agent to remove the reactive oxygen species formed from catalyst regeneration and radical coupling reactions with O(2), allowing
Oxidative Synthesis of Cyclic Acyl Aminals through Carbon−Carbon σ-Bond Activation
作者:Danielle L. Aubele、Paul E. Floreancig
DOI:10.1021/ol026538m
日期:2002.10.1
[GRAPHICS]Acyliminium ions can be prepared through photoinitiated single-electron oxidation reactions of homobenzylic amides and carbamates. Cyclic acyl aminals are formed when these acyliminium ions are appended to nucleophiles such as hydroxyl, ether, and sulfonamide groups. The scope of these reactions is discussed along with mechanistic issues relating to the energetics, chemoselectivity, and stereoelectronic effects of bond activation.