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
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.