The virtue of methylenecyclopropane terminators in intramolecular Pauson-Khand reactions
作者:Andreas Stolle、Heike Becker、Jacques Salaün、Armin de Meijere
DOI:10.1016/s0040-4039(00)73224-2
日期:1994.5
6-Cyclopropylidene-1-hexynes like 2, e. g. prepared via palladium(0)-catalyzed substitution of 1-ethenyl cyclopropyl sulfonates 1, undergo an intramolecularPauson-Khandreaction both efficiently and regioselectively.
Stolle Andreas, Beeser Heike, Salauen Jacques, de Meijere Armin, Tetrahedron Lett, 35 (1994) N 21, S 3517-3520
作者:Stolle Andreas, Beeser Heike, Salauen Jacques, de Meijere Armin
DOI:——
日期:——
Nucleophilic substitutions of 1-alkenylcyclopropyl esters and 1-alkynylcyclopropyl chlorides catalyzed by palladium(0)
作者:Andreas Stolle、Jean Ollivier、Pier Paolo Piras、Jacques Salaun、Armin De Meijere
DOI:10.1021/ja00037a006
日期:1992.5
dimethylallyl acetates 19 and 22, respectively. Use of chiral phosphines as ligands in the palladium catalyst can provide optically active methylenecyclopropane derivatives. With phenyl-, methyl-, and even n-butylzinc chloride as nucleophiles, the reaction apparently proceeds with initial transfer of the organic residue to palladium, followed by reductive elimination entailing tertiary substitution on the cyclopropane