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Other processes that likely involve Group 9 metal carbene complexes as reactive intermediates are depicted in Scheme 74 and include: (1) rhodium-catalyzed enyne (e.g. 1056) cycloisomerization through cyclopropylcarbene complex intermediates (e.g. 1057) (this transformation is usually associated with ...
ChemInformCao, P.; Zhang, X. "The First Highly Enantioselective Rh-Catalyzed Enyne Cycloisomerization." Angew. Chem., Int. Ed. Engl. 2000, 39, 4104-4106.The First Highly Enantioselective Rh-Catalyzed Enyne Cycloisomerization. Cao, P,Zhang, X. Angewandte Chemie International Edition . 2000...
A formal [3+3+1] reaction through gold(I)‐catalyzed enyne cycloisomerization of enyne‐methylenecyclopropanes and rhodium(I)‐catalyzed [6+1] reaction of vinylspiropentanes and CO has been developed to synthesize aza‐6/7 bicyclic compounds, hexahydrocyclohepta[c]pyridinones. DFT calculations ...
We report the first Rh 2 (II)-catalyzed asymmetric cycloisomerization of activated enynes to provide cyclopropane-fused tetra-hydropyridines in good yields and excellent enantioselectivities under mild conditions. The activated group, CHZ (Z is electron-withdrawing group (EWG)), in the enyne ...
In the case of alkene-tethered 1,6-allenyne, both 1,2- and 2,1-insertions of alkene into the Rh-C(sp(2)) bond of the five-membered rhodacyclic intermediate are plausible, and the resulting rhodium-alkyl intermediates will afford cycloisomerization products through reductive elimination. In ...
In addition to the skeletal reorganization of enynes, Rh(II) complexes were found to have a high catalytic activity for some cycloisomerization reactions of alkyne derivatives, including the bicyclization of enynes to bicyclo[4.1.0]heptene derivatives and the cyclization of alkynylfurans to phenol ...
DepartmentProf.DepartmentWileyAngewandte ChemieCao, P.; Zhang, X. "The First Highly Enantioselective Rh-Catalyzed Enyne Cycloisomerization." Angew. Chem., Int. Ed. Engl. 2000, 39, 4104-4106.The First Highly Enantioselective Rh-Catalyzed Enyne Cycloisomerization. Cao, P,Zhang, X. Angewandte ...
Cao, P.; Zhang, X. "The First Highly Enantioselective Rh-Catalyzed Enyne Cycloisomerization." Angew. Chem., Int. Ed. Engl. 2000, 39, 4104-4106.The First Highly Enantioselective Rh-Catalyzed Enyne Cycloisomerization. Cao, P,Zhang, X. Angewandte Chemie International Edition . 2000...
Xumu ZhangDepartment of Chemistry The Pennsylvania State University University Park, PA 16802 (USA) Fax: (+1) 814‐863‐8403John Wiley & Sons, LtdAngewandte Chemie International EditionCao, P.; Zhang, X. "The First Highly Enantioselective Rh-Catalyzed Enyne Cycloisomerization." Angew. Chem.,...