Y. Baba et al., STEREOSELECTIVE AND REGIOSELECTIVE BROMINATION OF 1,5-CYCLOOCTADIENE DERIVATIVES AND THEIR SUBSTITUTION-REACTIONS WITH ORGANOCOPPER REAGENTS, Synlett, (12), 1997, pp. 1393-1394
Bromination of tetramethyl cyclooctadiene-1,2,5,6-tetracarboxylate wit
h N-bromosuccinimide took place with high selectivity to give the corr
esponding 3,7-cis-dibromide, which allowed us to introduce two (the sa
me or different) alkyl substituents at C(3) and C(7) with one-step or
stepwise use of organocopper reagents.