Jg. Bendall et al., INTRODUCTION OF BROMINE AND CHLORINE SUBSTITUENTS IN MEDIUM RING ETHERS AND LACTONES, Chemical communications, (11), 1997, pp. 1067-1068
A convenient preparation of alpha-halo enamines using oxalyl halides i
s described together with applications of these reagents in the haloge
nation of beta-hydroxy cyclic ethers and lactones.