Palladium-Catalyzed Intramolecular Aminofluorination of Unactivated Alkenes
作者:Tao Wu、Guoyin Yin、Guosheng Liu
DOI:10.1021/ja9076588
日期:2009.11.18
A novel palladium-catalyzedintramolecular oxidative aminofluorination of unactivatedalkenes has been developed, in which AgF was used as a key fluorinating reagent and PhI(OPiv)(2) as oxidant. The reaction afforded vicinal fluoroamine products with very high regioselectivity. A Pd(II/IV) catalytic cycle was proposed, and preliminary mechanistic studies indicated that direct reductive elimination
Flexible Gold-Catalyzed Regioselective Oxidative Difunctionalization of Unactivated Alkenes
作者:Teresa de Haro、Cristina Nevado
DOI:10.1002/anie.201005763
日期:2011.1.24
AuI/AuIIIcatalyticcycles can trigger three highly regioselective alkene difunctionalization processes that involve the formation of C(sp3)O, C(sp3)N, and C(sp3)C(sp2) bonds. The reaction can proceed by reductive elimination on the oxidized gold center with complete retention of the configuration or through two subsequent nucleophilic substitution reactions via an aziridine intermediate.
Highly Selective Palladium-Catalyzed Intramolecular Aminonitroxylation of Alkenes
作者:Guosheng Liu、Shujun Chen、Tao Wu、Xingliang Zhen
DOI:10.1055/s-0030-1259701
日期:2011.4
A palladium-catalyzedintramolecular oxidative aminonitroxylationof unactivated alkenes, in which AgNO 3 functioned as amild nitrate reagent in the presence of PhI(OAc) 2 , hasbeen developed. Mechanistic studies suggest that this selectiveaminonitroxylation reaction likely resulted from a new oxidant PhI(ONO 2 ) 2 generatedin situ from AgNO 3 and PhI(OAc) 2 .