Copper-Catalyzed Tandem Conjugate Addition−Electrophilic Trapping: Ketones, Esters, and Nitriles as Terminal Electrophiles
摘要:
Exposure of enone substrates 1a-18a, which possess appendant ketone, ester, and nitrile moieties, to Et2Zn in the presence of catalytic Cu(OTf)2/P(OEt)3 provides the cyclized products in good to excellent yields and diastereoselectivities. These results represent the first use of ketones, esters, and nitriles as terminal electrophiles in Cu-catalyzed conjugate addition-electrophilic trapping.
Copper-Catalyzed Tandem Conjugate Addition−Electrophilic Trapping: Ketones, Esters, and Nitriles as Terminal Electrophiles
作者:Kyriacos Agapiou、David F. Cauble、Michael J. Krische
DOI:10.1021/ja030603l
日期:2004.4.1
Exposure of enone substrates 1a-18a, which possess appendant ketone, ester, and nitrile moieties, to Et2Zn in the presence of catalytic Cu(OTf)2/P(OEt)3 provides the cyclized products in good to excellent yields and diastereoselectivities. These results represent the first use of ketones, esters, and nitriles as terminal electrophiles in Cu-catalyzed conjugate addition-electrophilic trapping.
Gold/Lewis acid catalyzed oxidative cyclization involving activation of nitriles
作者:Ali Wang、Xin Xie、Chunli Zhang、Yuanhong Liu
DOI:10.1039/d0cc06875f
日期:——
A gold-catalyzed oxidative cyclization of alkyne–nitriles using water or alcohol as the external nucleophiles has been developed. The catalytic system, featured with gold and Lewis acid dual catalysis, allows a facile synthesis of functionalized isoquinolin-1(2H)-ones and 1-alkoxy-isoquinolines with a wide structural diversity.