W. Oppolzer, R. Swenson, J. Gaudin
1988
Citations
0
Influential Citations
22
Citations
Journal
Tetrahedron Letters
Abstract
Abstract Pd(O)-catalyzed cyclizations of 1-acetoxy-2-methylene-6-heptenes( 3 → 4 , 18 → 19 ) are consistent with a allylpalladium/olefin insertion involving a metal-transfer to the distal alkene terminal. Cyclization 7 → 8 exemplifies a new stereocontrolled access to exocyclic trisubstituted alkenes which indicates a C,C-bond formation at the less substituted allylpalladium terminal thus showing a regio- and stereochemistry opposite to the type-II-magnesium-ene process 12 → 14 .