REACTIONS OF ETA(2)-(2-ACYLARYL-C,O)TETRACARBONYLMANGANESE(I) COMPLEXES WITH SOME VINYL SULFUR-COMPOUNDS

The thermally promoted reactions of some phenyl and diterpenoid eta2-( 2-acylaryl-C,O)tetracarbonylmanganese(I) complexes with phenyl vinyl s ulfone, methyl vinyl sulfone, or phenyl vinyl sulfoxide, have been inv estigated. The major products from the diterpenoid complexes arise fro m insertion followed by reductive demetallation; cyclopenta-annulation , when it occurs, is a minor process. Liberation of the metal-free add ucts from their Mn-containing precursors requires treatment with eithe r acid or photolysis-oxidation.