Preparation of allyl-, alkenyl- and of functionalized arylmanganese reagents by oxidative insertion of manganese-graphite into organic halides

Article abstract of DOI:10.1016/0040-4039(96)01591-2

Reduction of MnBr₂·nLiBr (n = 1,2) with 2 C₈K in THF affords highly active Mn-graphite, which readily insert into allyl-, alkenyl-, (substituted) aryl- and heteroaryl halides. The functionalized organomanganese compounds thus obtained may be efficiently trapped with different electrophiles such as aldehydes, anhydrides and acid chlorides, or can be cross-coupled with alkenyl halides in the presence of catalytic amounts of Fe(acac)₃.