Commercially available neat organozincs as highly reactive reagents for catalytic enantioselective addition to ketones and aldehydes under solvent free conditions
作者:Manabu Hatano、Tomokazu Mizuno、Kazuaki Ishihara
DOI:10.1016/j.tet.2011.02.042
日期:2011.6
Ph2Zn, and highly concentrated Me2Zn are highly reactive organozinc reagents, which are commercially available in bulk quantities. We here report a catalytic enantioselective Et2Zn, Ph2Zn, and Me2Zn addition to ketones and aldehydes under solvent free or highly concentrated conditions without Ti(Oi-Pr)4 as a conventional activator of organozinc reagents. The desired optically active tertiary and secondary
净Et 2 Zn,Ph 2 Zn和高浓度Me 2 Zn是高反应性有机锌试剂,可以大量购买。我们在这里报告了在无溶剂或高浓度条件下没有Ti(O i -Pr)4的情况下,对酮和醛的催化对映选择性Et 2 Zn,Ph 2 Zn和Me 2 Zn。作为有机锌试剂的常规活化剂。与常规溶剂使用条件相比,以高收率和高对映选择性获得了所需的旋光性叔醇和仲醇。从绿色化学中的生态和环境原因的角度出发,这种催化作用不仅对学术用途而且对工业用途都是实用的。