Iodonium ylides of methyl 3-oxo-trans,trans-6,8-tetradecadienoate (1) and diprotected methyl 3,5-di(t-butyldimethyl-silyloxy)-2,6,8-tetradecatrieneoate (5) undergo regio-and stereoselective intramolecular cyclopropanation with Cu(I)Cl catalysis to form key bicyclo[3.1.0] intermediates for prostaglandin synthesis. (C) 1998 Elsevier Science Ltd. All rights reserved.
Iodonium ylides of methyl 3-oxo-trans,trans-6,8-tetradecadienoate (1) and diprotected methyl 3,5-di(t-butyldimethyl-silyloxy)-2,6,8-tetradecatrieneoate (5) undergo regio-and stereoselective intramolecular cyclopropanation with Cu(I)Cl catalysis to form key bicyclo[3.1.0] intermediates for prostaglandin synthesis. (C) 1998 Elsevier Science Ltd. All rights reserved.