Various active methylene compounds were carboxylated by employing the reagent system, 1,8-diazabicyclo(5.4.0)-7-undecene and carbon dioxide, in organic solvents or without solvent at room temperature.
The Fe4S4(SPh)4*-cluster, in MeCN or MeCN-MeOH (1 : 1) containing t-butyl thiol and Et3N, catalyses the reduction of nitrobenzene and m-dinitrobenzene to aniline and m-nitroaniline, respectively, with concomitant oxidation of the terminal ligand of the Fe& cluster to t-butyl phenyl disulphide, and then di-t-butyl disulphide.
A phenyl-lithium activated Fe4S4 cluster acts as a hydride transfer agent in the hydrogenation of carbonyl compounds with hydrogen gas to give alcohols and exhibits substrate selectivity in the hydrogenation.
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