Pd-Catalyzed Alkene Difunctionalization Reactions of Enolates for the Synthesis of Substituted Bicyclic Cyclopentanes
作者:Evan C. Bornowski、Elsa M. Hinds、Derick R. White、Yusuke Nakamura、John P. Wolfe
DOI:10.1021/acs.oprd.9b00248
日期:2019.8.16
Palladium-catalyzed alkene difunctionalization reactions between alkenes bearing tethered aryl or alkenyl triflates and enolate nucleophiles are described. The transformations form two C–C bonds, a ring, and up to two stereocenters while producing substituted cyclopentane derivatives that contain appended carbonyl functionality. Products are formed with up to >20:1 diastereoselectivity, and the formation
Pd-Catalyzed Alkene Difunctionalization Reactions of Malonate Nucleophiles: Synthesis of Substituted Cyclopentanes via Alkene Aryl-Alkylation and Akenyl-Alkylation
作者:Derick R. White、Elsa M. Hinds、Evan C. Bornowski、John P. Wolfe
DOI:10.1021/acs.orglett.9b01258
日期:2019.5.17
The Pd-catalyzed coupling of malonate nucleophiles with alkenes bearing tethered aryl or alkenyl triflates is described. These alkene difunctionalization reactions afford malonate-substituted cyclopentanes that contain fused aryl or cycloalkenyl rings. The transformations generate a five-membered ring, two C-C bonds, and provide products bearing up to three stereocenters with good chemical yield and
Palladium-Catalyzed Alkene Carboalkoxylation Reactions of Phenols and Alcohols for the Synthesis of Carbocycles
作者:Derick R. White、Madeline I. Herman、John P. Wolfe
DOI:10.1021/acs.orglett.7b01975
日期:2017.8.18
triflate electrophile and exogenous alcohol or phenol nucleophiles are described. These transformations afford substituted indanyl or alkylidenecyclopentyl ethers in high yield with excellent diastereoselectivity. The transformations proceed through intermolecular capture of an intermediate [Pd(II)-alkene]+[OTf]− complex by the alcohol or phenol nucleophile.
Stereocontrolled Synthesis of Amino‐Substituted Carbocycles by Pd‐Catalyzed Alkene Carboamination Reactions
作者:Derick R. White、John P. Wolfe
DOI:10.1002/chem.201700466
日期:2017.4.24
through a stereoselective intermolecular Pd‐catalyzed alkenecarboaminationreaction between alkenyl triflates bearing a pendant alkene and exogenous amine nucleophiles. The reactions are effective with a range of different substrate combinations, and proceed with generally high diastereoselectivity. Use of (S)‐tBuPhox as the ligand in reactions of achiral substrates provides enantioenriched products
Pd-Catalyzed Alkene Carboheteroarylation Reactions for the Synthesis of 3-Cyclopentylindole Derivatives
作者:Janelle K. Kirsch、Jenna L. Manske、John P. Wolfe
DOI:10.1021/acs.joc.8b02165
日期:2018.11.2
The Pd-catalyzed alkene carboheteroarylation of aryl and alkenyl triflate electrophiles bearing pendant alkenes with heteroaromatic nucleophiles affords substituted carbocycles with 3-indolyl or 3-pyrrolyl groups. The products are obtained in moderate to good yields, and the use of alkenyl triflate substrates produces products with high diastereoselectivities. The transformation is believed to proceed