Allenes bearing a nucleophilic group cyclize on treatment with acyltetracarbonyl cobalt complexes in the presence of mild bases. Various nucleophilic groups and cobalt complexes can be used to give highly functionalized pyrrolidines, cyclopentanes and tetrahydrofurans. Disubstituted allenes may be used in the reaction. 1,3-disubstituted allenes give products with high stereoselectivity.
Davies Ian W., Shaw Robert W., Wisedale Richard, Gallagher Timothy, J. Chem. Soc. Perkin Trans. 1, (1994) N 24, S 3557-3561
作者:Davies Ian W., Shaw Robert W., Wisedale Richard, Gallagher Timothy
DOI:——
日期:——
Palladium-Catalyzed Intramolecular Hydroamination of Allenes Coupled to Aerobic Alcohol Oxidation
作者:Shuifa Qiu、Yunyang Wei、Guosheng Liu
DOI:10.1002/chem.200802381
日期:2009.3.9
Taking the air! A PdII‐catalyzed intramolecular hydroamination of allenes coupled to alcohol oxidation has been developed. This reaction is performed by using a nitrogen‐based ligand under aerobic conditions, under which the molecular oxygen is used as the terminal oxidant for the reoxidation of Pd0 species to complete the catalyticcycle.