Lewis Acid Catalyzed Diastereoselective Vinylogous Mannich Reaction Induced by O-Pivaloylated d-Galactosylamine as the Chiral Auxiliary: Stereoselective Synthesis of 6-Arylpiperidin-2-ones
作者:Zhiwei Miao、Ruyu Chen、Bing Cui、Shasha Kong、Guiping Wu
DOI:10.1055/s-0031-1289635
日期:2012.1
derivatives, in the form of (S)-δ-amino-δ-arylpent-2-enoic ester, has been achieved in high yield via a vinylogous Mannich reaction, utilizing poly-O-pivaloylated d-galacosylamine as the chiral auxiliary. (S)-6-p-Tolylpiperidine-2-one can be stereoselectively synthesized from (S)-δ-amino-δ-arylpent-2-enoic ester by sequential hydrogenation of the double bond, cyclic lactam formation, and removal of
(S)-δ-氨基-δ-芳基戊-2-烯酸酯形式的β-N-糖苷键连接的α,β-不饱和δ-氨基羰基衍生物的非对映特异性形成已通过乙烯基得到曼尼希反应,利用聚-O-聚乙烯醇化的d-半乳糖苷胺作为手性助剂。(S)-6-对甲苯基哌啶-2-酮可以通过(S)-δ-氨基-δ-芳基戊-2-烯酸酯通过顺序地双键加氢,环内酰胺的形成和除去的方式立体合成。在基本条件下为N-糖苷助剂。 乙烯基曼尼希反应-碳水化合物-手性助剂-立体选择性合成-6-芳基哌啶-2-酮