Synthesis of Adjacent Quaternary Stereocenters by Catalytic Asymmetric Allylboration
作者:Rauful Alam、Tobias Vollgraff、Lars Eriksson、Kálmán J. Szabó
DOI:10.1021/jacs.5b07498
日期:2015.9.9
Allylboration of ketones with γ-disubstituted allylboronicacids is performed in the presence of chiral BINOL derivatives. The reaction is suitable for single-step creation of adjacent quaternary stereocenters with high selectivity. We show that, with an appropriate choice of the chiral catalyst and the stereoisomeric prenyl substrate, full control of the stereo- and enantioselectivity is possible
酮与 γ-二取代的烯丙基硼酸的烯丙基硼化是在手性 BINOL 衍生物的存在下进行的。该反应适用于单步生成相邻四元立体中心的高选择性。We show that, with an appropriate choice of the chiral catalyst and the stereoisomeric prenyl substrate, full control of the stereo- and enantioselectivity is possible in the reaction.
[EN] METHODS OF MAKING DIASTEREOMERIC ORGANIC COMPOUNDS<br/>[FR] PROCÉDÉS DE SYNTHÈSE DE COMPOSÉS ORGANIQUES DIASTÉRÉOISOMÈRES
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2012087720A1
公开(公告)日:2012-06-28
Disclosed is a process for making diastereomeric compound of the formula (I): wherein m, n and R1 to R4 are as defined herein. The process of the invention provides the compound of formula (I) in high yield and substantially free of the corresponding diastereomers. The compounds of formula (I) prepared by the process of the invention are useful for making pharmaceutically active compounds such as 11- β-hydroxysteroid hydrogenase type 1 (11- β-HSD1) inhibitors.
[EN] PROCESS FOR ASYMETRIC METHYLALLYLATION IN THE PRESENCE OF A 2, 2 ' - SUBSTITUTED 1, 1 ' -BI - 2 -NAPHTHOL CATALYST<br/>[FR] PROCÉDÉ POUR MÉTHYLALLYLATION ASYMÉTRIQUE EN PRÉSENCE D'UN CATALYSEUR NAPHTOL-2-BI-1,1' SUBSTITUÉ 2, 2'
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2012122152A1
公开(公告)日:2012-09-13
Disclosed are a process and catalysts useful for carrying out asymmetric methlyallylations. The catalysts used in the invention have the formula (IV): wherein X1, X2, R3 and R4 are as defined herein. Compounds made by the process of the invention can be used to prepare pharmaceutically active compounds such as 11-β- hydroxysteroid hydrogenase type 1 (11-β-HSD1) inhibitors including 1, 3-disubstituted oxazinan-2-ones.
METHODS OF MAKING DIASTEREOMERIC ORGANIC COMPOUNDS
申请人:Fandrick Daniel Robert
公开号:US20140135493A1
公开(公告)日:2014-05-15
Disclosed is a process for making diastereomeric compound of the formula (I): wherein m, n and R
1
to R
4
are as defined herein. The process of the invention provides the compound of formula (I) in high yield and substantially free of the corresponding diastereomers. The compounds of formula (I) prepared by the process of the invention are useful for making pharmaceutically active compounds such as 11-β-hydroxysteroid hydrogenase type 1 (11-β-HSD1) inhibitors.
Asymmetric Methallylation of Ketones Catalyzed by a Highly Active Organocatalyst 3,3′-F<sub>2</sub>-BINOL
作者:Yongda Zhang、Ning Li、Bo Qu、Shengli Ma、Heewon Lee、Nina C. Gonnella、Joe Gao、Wenjie Li、Zhulin Tan、Jonathan T. Reeves、Jun Wang、Jon C. Lorenz、Guisheng Li、Diana C. Reeves、Ajith Premasiri、Nelu Grinberg、Nizar Haddad、Bruce Z. Lu、Jinhua J. Song、Chris H. Senanayake
DOI:10.1021/ol400498a
日期:2013.4.5
(S)-3,3'-F-2-BINOL has been synthesized for the first time and demonstrated as a highly active organocatalyst for asymmetric methallylation of ketones. Up to 98:2 enantioselectivity and 99% yield were obtained with 5 mol % catalyst loading. The catalyst (S)-3,3'-F-2-BINOL could be easily recovered and reused.