Asymmetric heck reaction of alkenyl iodides in the presence of silver salts. Catalytic asymmetric synthesis of decalin and functionalized indolizidine derivatives
Decalin derivatives3 (up to 80% ee) and indolizidine derivative 6 (up to 86% ee) have been synthesized by an asymmetric Heck reaction starting with prochiral alkenyl iodides 1 and 4, respectively. The important role of silver salts in the asymmetric Heck reaction is discussed, and the conversion of 6 to δ-coniceine (24) is also described.
A greatly improved catalytic asymmetric synthesis of the cis-decalin derivatives as well as an important role of silversalts in asymmetric Heck-type reaction is described.
Chiral 2,2'-bis(diphenylarsino)-1,1'-binaphthyl (BINAs) was synthesized and found to be an effective ligand in an alkenyl iodide-using intramolecular asymmetric Heck reaction. (C) 1997 Elsevier Science Ltd.