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.
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.
Catalytic Aerobic Generation of Acyliminium Ions through Electron-Transfer-Mediated Carbon-Carbon Bond Activation
作者:Danielle L. Aubele、Jason C. Rech、Paul E. Floreancig
DOI:10.1002/adsc.200303173
日期:2004.2
mesolytic cleavage reactions to form acyliminiumions. Appending nucleophilic groups to these substrates results in cyclization reactions to form N-acylaminals. The N-methylquinolinium ion that serves as the photooxidant in these reactions can function as a catalyst when dioxygen is introduced into these reactions, representing a unique method for effecting catalytic, aerobic oxidations. Herein we present