Ring Closing Metathesis Reaction of Dienes With Acrylate Moiety Leading to 5- to 7-Membered Lactiones and Cyclization to 14-Membered Rings

摘要

Dienes with acrylate moiety have been subjected to olefin metathesis reactions uing (OPCy_3)_2Cl_2Ru=CHPh (1) and (PCy_3)Cl_2[H_2imid(Mes)_2]Ru=CHPh (2). 5-to 7-Membered #alpha#,#beta#-unsaturated lactones were obtained in good yields. Formation of 14-membered compounds was attempted using different substrates.