ENANTIOSELECTIVE PREPARATION OF DIHYDROPYRIMIDONES
作者:Goss, Jennifer M.、Dai, Peng、Lou, Sha、Schaus, Scott E.、Brkovic, Tanja、Hughes, David
DOI:10.15227/orgsyn.086.0236
日期:——
[EN] CHIRAL AMINE-CATALYZED ASYMMETRIC ADDITION OF CARBON-CENTERED NUCLEOPHILES TO IMINES<br/>[FR] ADDITION ASYMETRIQUE CATALYSEE PAR UNE AMINE CHIRALE DE NUCLEOPHILES CARBONES SUR DES IMINES
申请人:UNIV BOSTON
公开号:WO2007011910A2
公开(公告)日:2007-01-25
[EN] The present invention relates to an asymmetric synthesis useful for preparing compounds useful for the treatment of cardiovascular diseases and for studying the role of motor proteins in cell cycle progression. [FR] La présente invention porte sur une synthèse asymétrique utilisée pour préparer des composés utilisés servant au traitement de maladies cardiovasculaires et pour étudier le rôle de protéines motrices dans la progression d'un cycle cellulaire.
Asymmetric Mannich Reaction of Dicarbonyl Compounds with α-Amido Sulfones Catalyzed by Cinchona Alkaloids and Synthesis of Chiral Dihydropyrimidones
作者:Sha Lou、Peng Dai、Scott E. Schaus
DOI:10.1021/jo701777g
日期:2007.12.1
The highly enantioselective cinchona alkaloid-catalyzed Mannich reaction of dicarbonyl compounds with α-amidosulfones as acyl imine precursors is described. The reaction requires 10 mol % of the cinchona alkaloid catalyst, which serves as a general base to generate acyl imines in situ, and aqueous Na2CO3 to maintain the concentration of free alkaloid catalyst. The reaction products are obtained in
描述了二羰基化合物与α-酰胺基砜作为酰基亚胺前体的高度对映选择性金鸡纳生物碱催化的曼尼希反应。该反应需要10 mol%的金鸡纳生物碱催化剂和Na 2 CO 3水溶液,该催化剂可作为一般的碱在现场生成酰基亚胺。保持游离生物碱催化剂的浓度。以高收率和高对映选择性以及从1∶1至> 95∶5的非对映选择性获得反应产物。辛可宁催化的反应提供了高度实用的结构单元的实际途径,该结构单元已用于手性二氢嘧啶酮的合成,手性二氢嘧啶酮是一类具有多种生物活性的化合物。二氢嘧啶酮修饰包括使用H-Cube流动氢化器和Rh(II)介导的1,3-偶极环加成反应对烯酰胺部分进行高度非对映选择性氢化,以提供高度官能化的复杂杂环。
Asymmetric Mannich Reactions of β-Keto Esters with Acyl Imines Catalyzed by Cinchona Alkaloids
作者:Sha Lou、Brandon M. Taoka、Amal Ting、Scott E. Schaus
DOI:10.1021/ja0537373
日期:2005.8.1
Cinchona alkaloids catalyze the enantioselective Mannich reaction of beta-keto esters with acyl aryl imines. The reaction requires 10 mol % of cinchonine or cinchonidine. The reaction products are obtained in good yields (81-99%), high enantioselectivities (80-96% ee), and in diastereoselectivities that range from 1:1 to >95:5. The cinchonine-catalyzed reaction provides access to highly functionalized