[EN] PROCESS FOR THE PREPARATION OF CHIRAL PYROLLIDINE-2-YL- METHANOL DERIVATIVES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS CHIRAUX DE PYROLLIDINE-2-YL-MÉTHANOL
申请人:HOFFMANN LA ROCHE
公开号:WO2018153820A1
公开(公告)日:2018-08-30
The invention relates to a novel process for the preparation of a chiral pyrollidine-2-yl-methanol derivative or a salt thereof of the formula (I), wherein R1 is aryl or heteroaryl and both aryl or heteroaryl are optionally substituted by C1-4-alkyl, halo-C1-4-alkyl, C1-4-alkoxy or halogen. The synthesis proceeds through an intermediate Weinreb amide, which is reacted with a Grignard reagent and hydrogenated. The chiral pyrollidine-2-yl-methanol derivatives of the formula (I) are versatile building blocks in the synthesis of pharmacologically active compounds, such as for the stereospecific synthesis of oligonucleotides carrying chiral phosphonate moieties.
Synthesis of novel phase transfer catalysts derived from proline-mandelic acid/tartaric acid: their evaluation in enantioselective epoxidation and Darzen condensation
作者:Deepak P Mahajan、Himanshu M Godbole、Girij P Singh、Gautham G Shenoy
DOI:10.1007/s12039-019-1597-6
日期:2019.3
characterization of novel chiral phase transfer catalysts from proline, mandelic acid and tartaric acid. The synthesis of these newly explored cyclic derivatives is reported by using a simple method with competitive yields. The effectiveness of these novel chiral cyclic phase transfer catalysts was evaluated by applying them in enantioselective epoxide synthesisfrom \(\alpha \), \(\beta \) unsaturated chalcone
摘要 在此,我们已经描述了新型手性环状相转移催化剂(PTC)的合成。这些催化剂是通过脯氨酸,扁桃酸和酒石酸使用简单的合成方法,以具有竞争力的收率合成的。这些手性环状相转移催化剂已经通过((^ 1}))1 H NMR和((^ 13})) C NMR光谱,IR光谱和元素分析进行了表征。通过将它们应用于由\(\ upalpha \),\(\ upbeta \)的对映选择性环氧化物合成中,评估了这些新型手性环状相转移催化剂的有效性。不饱和酮(查耳酮)与Darzens缩合反应。所得结果表明脯氨酸,扁桃酸和酒石酸的合成衍生物作为PTC是有效的。 图形概要概述本文分享了脯氨酸,扁桃酸和酒石酸新型手性相转移催化剂的合成与表征。这些新探索的环状衍生物的合成方法是使用一种具有竞争优势的简单方法进行报道。这些新型手性环的相转移催化剂的有效性是通过从应用它们在对映选择性环氧化物合成评价\(\阿尔法\) ,