S. Matsubara et al., Diastereoselective 1,4-addition reactions of bis(iodozincio)ethane to alpha,beta-unsaturated ketones, SYNLETT, (8), 2000, pp. 1202-1204
Conjugate addition of 1,1-bis(iodozincio)ethane to chalcone in a presence o
f chlorotrimethylsilane proceeded diastereoselectively to produce the corre
sponding silyl enolate of gamma-iodo-zincioketone.