Lewis Acid-Catalyzed Asymmetric Diels–Alder Reactions Using Chiral Sulfoxide Ligands: Chiral 2-(Arylsulfinylmethyl)-1,3-oxazoline Derivatives
作者:Kazuhiro Watanabe、Takashi Hirasawa、Kunio Hiroi
DOI:10.1248/cpb.50.372
日期:——
New chiral sulfoxide-1,3-oxazoline ligands have been developed as chiral ligands for Lewis acid-catalyzed asymmetric Diels-Alder reactions. The use of chiral sulfinyl 1,3-oxazoline ligands in copper(II)-catalyzed asymmetric Diels-Alder reactions provided an endo cycloadduct as a major product with moderate enantioselectivity. A rationale is proposed for the mechanism of the asymmetric induction.
已开发出新的手性亚砜-1,3-恶唑啉配体作为路易斯酸催化的不对称Diels-Alder反应的手性配体。在铜(II)催化的不对称Diels-Alder反应中使用手性亚磺酰基1,3-恶唑啉配体可提供内环加合物作为主要产物,具有中等对映选择性。提出了不对称感应机理的基本原理。