V. Gagliardini et al., CHROMIUM HYDRIDE INTERMEDIATES IN THE CASE OF CINE AND TELE-META NUCLEOPHILIC AROMATIC-SUBSTITUTION ON ARENETRICARBONYLCHROMIUM COMPLEXES, Inorganica Chimica Acta, 259(1-2), 1997, pp. 265-271
Treatment of (eta(6)-1,2,3-trimethoxybenzene) and (eta(6)-veratrole) t
ricarbonylchromium complexes 1 and 5 with a carbanion in THF and then
with acid affords as the major products 4-substituted (eta(6)-veratrol
e) and 3-substituted (eta 6-anisole) tricarbonylchromium complexes acc
ording to tele-meta and cine nucleophilic aromatic substitutions, resp
ectively.