RHODIUM-CATALYZED DIBORATION OF UNSTRAINED INTERNAL ALKENES AND A NEWAND GENERAL-ROUTE TO ZWITTERIONIC [L2RH(ETA(6)-CATBCAT)] (CAT = 1,2-O2C6H4) COMPLEXES
Cy. Dai et al., RHODIUM-CATALYZED DIBORATION OF UNSTRAINED INTERNAL ALKENES AND A NEWAND GENERAL-ROUTE TO ZWITTERIONIC [L2RH(ETA(6)-CATBCAT)] (CAT = 1,2-O2C6H4) COMPLEXES, Chemical communications, (18), 1998, pp. 1983-1984
Reactions of [L2Rh(acac)] (L = alkene or phosphine) with B(2)cat(3) yi
eld the zwitterionic complexes [L2Rh(eta(6)-catBcat)] and [(acac)Bcat]
cleanly; [(dppm)Rh(eta(6)-catBcat)], the X-ray structure of which is
reported, is an excellent catalyst for the diboration of vinylarenes a
nd unstrained internal alkenes cis- and trans-stilbene and trans-beta-
methylstyrene.