title: Application of Bidentate Oxazoline-Carbene Ligands with Planar and Central Chirality in Asymmetric β-Boration of α,β-Unsaturated Esters.
abstract: A series of new oxazoline-substituted imidazolium salts based on [2.2]paracyclophane were synthesized and characterized. The new bidentate oxazoline-carbene precursor with planar and central chirality had significant advantage than the bicyclic 1,2,4-triazolium salt derived from [2.2]paracyclophane as a monodentate carbene ligand in Cu(I)-catalyzed asymmetric β-boration of α,β-unsaturated esters, giving the desired products in high enantioselectivities and yields.
authors.affiliation: Department of Chemistry, Shandong University, Shanda South Road No. 27, Jinan 250100, P. R. China.
authors.forename: Zonghong
authors.initials: Z
authors.lastname: Niu
authors.affiliation: Department of Chemistry, Shandong University, Shanda South Road No. 27, Jinan 250100, P. R. China.
authors.forename: Jianqiang
authors.initials: J
authors.lastname: Chen
authors.affiliation: Department of Chemistry, Shandong University, Shanda South Road No. 27, Jinan 250100, P. R. China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Department of Chemistry, Shandong University, Shanda South Road No. 27, Jinan 250100, P. R. China.
authors.forename: Manyuan
authors.initials: M
authors.lastname: Ma
authors.affiliation: Department of Chemistry, Shandong University, Shanda South Road No. 27, Jinan 250100, P. R. China.
authors.forename: Chun
authors.initials: C
authors.lastname: Song
authors.affiliation: Department of Chemistry, Shandong University, Shanda South Road No. 27, Jinan 250100, P. R. China.
authors.forename: Yudao
authors.initials: Y
authors.lastname: Ma