Highly efficient desymmetrisation of a tricarbonylchromium 1,4-dibromonaphthalene complex by asymmetric Suzuki–Miyaura coupling
作者:Xavier Urbaneja、Audrey Mercier、Céline Besnard、E. Peter Kündig
DOI:10.1039/c1cc10347d
日期:——
Access to planar chiral complexes has been sought by catalytic desymmetrisation of a prochiral complex via asymmetric SuzukiâMiyaura cross-coupling. High selectivities of up to 98% ee were achieved using a bulky chiral palladium catalyst.
selectively substituted naphthalenetricarbonylchromium complexes are heated the tricarbonylchromium groups are redistributed between the substituted and the unsubstituted rings because of inter-ring haptotropic rearrangements. The rate constants of these isomerizations were measured. During rearrangement of individual isomers of (1-methylacenaphthene)tricarbonylchromium the configuration of the methyl group