New Entries in Lewis Acid−Lewis Base Bifunctional Asymmetric Catalyst: Catalytic Enantioselective Reissert Reaction of Pyridine Derivatives
作者:Eiko Ichikawa、Masato Suzuki、Kazuo Yabu、Matthias Albert、Motomu Kanai、Masakatsu Shibasaki
DOI:10.1021/ja045966f
日期:2004.9.1
chiral piperidine subunits, and catalytic enantioselective formal synthesis of CP-293,019, a selective D4 receptor antagonist, was achieved. Preliminary mechanistic studies indicated that both sulfoxides and phosphine sulfides can activate TMSCN as a Lewis base. In addition, the sulfoxides with appropriate stereochemistry might stabilize a highly enantioselective bimetallic complex (a presumed active catalyst)
描述了吡啶衍生物的第一个催化对映选择性 Reissert 反应,该反应提供了具有出色区域选择性和对映选择性的产物。成功的关键是开发新的路易斯酸-路易斯碱双功能不对称催化剂,其中包含铝作为路易斯酸和亚砜或硫化膦作为路易斯碱。这些反应可用于合成多种手性哌啶亚基,并实现了选择性 D4 受体拮抗剂 CP-293,019 的催化对映选择性形式合成。初步的机理研究表明,亚砜和硫化膦都可以将 TMSCN 作为路易斯碱活化。此外,