S. Jabretruffert et B. Waegell, INTRAMOLECULAR ACRYLOXYPALLADATION - STEREOSPECIFIC SYNTHESIS OF RING-FUSED UNSATURATED ALPHA-METHYLENE-GAMMA-BUTYROLACTONES, Tetrahedron letters, 38(5), 1997, pp. 835-836
The intramolecular carboxypalladation reaction [Pd(OAc)(2) 5 mol% NaOA
c 2 eq, O-2, THF, rt] of 2-(2-Cycloalken-1-yle) propenoic acids yields
ring fused alpha-methylene gamma-butyrolactones with good yields (75-
80%). (C) 1997, Published by Elsevier Science Ltd.