Reaction of an electrogenerated ‘iminium cation pool’ with organometallic reagents. Direct oxidative α-alkylation and -arylation of amine derivatives
作者:Seiji Suga、Masayuki Okajima、Jun-ichi Yoshida
DOI:10.1016/s0040-4039(01)00128-9
日期:2001.3
We have developed an efficient direct oxidative α-alkylation and -arylation of carbamates based on the ‘cation pool’ method. Grignard reagents, organozinc compounds, and organoaluminum compounds are effective as carbon nucleophiles toward iminium cation pools generated by low temperature electrolysis of carbamates.
Distannane mediated reaction of N-acyliminium ion pools with alkyl halides. A chain mechanism involving radical addition followed by electron transfer
作者:Tomokazu Maruyama、Seiji Suga、Jun-ichi Yoshida
DOI:10.1016/j.tet.2006.03.114
日期:2006.7
Hexabutyldistannane was found to be an effective mediator allowing the reaction of N-acyliminium ion pools with alkyl halides. A chain mechanism involving the addition of an alkyl radical generated from an alkyl halide to an N-acyliminium ion followed by the one-electron reduction of the resulting radical-cation by distannane was proposed.
Radical Addition to “Cation Pool”. Reverse Process of Radical Cation Fragmentation
作者:Tomokazu Maruyama、Seiji Suga、Jun-ichi Yoshida
DOI:10.1021/ja0511218
日期:2005.5.25
The reaction of an N-acyliminium ion with an alkyl iodide and hexabutyldistannane took place to give the alkylation product. A mechanism involving the addition of an alkyl radical to an N-acyliminium ion to produce the corresponding radicalcation has been suggested.
Reactions of a <i>N</i>-Acyliminium Ion Pool with Benzylsilanes. Implication of a Radical/Cation/Radical Cation Chain Mechanism Involving Oxidative C−Si Bond Cleavage
作者:Tomokazu Maruyama、Yusuke Mizuno、Ikuo Shimizu、Seiji Suga、Jun-ichi Yoshida
DOI:10.1021/ja068589a
日期:2007.2.1
The reaction of a N-acyliminium ion pool with benzylsilane proceeds by a chain mechanism involving oxidative C−Si bond cleavage. A radical/cation/radical cation crossover mechanism involving single electron transfer has been proposed. The effective binary system consisting of a stoichiometric amount of a benzylsilane and a catalytic amount of a more easily oxidized benzylstannane has been developed
Electroreduction of nitriles gave the corresponding decyanated products when Zn was used as the material of cathode in aprotic solvent (DMF or MeCN) containing Et4NOTs as a supporting electrolyte. Alkylation of amines at the α-position was effectively achieved by cyanation of amines at the α-position, and α-alkylation of the resultant α-amino nitriles followed by the electroreductive decyanation.