COMPOUNDS OF CHIRAL AROMATIC SPIROKETAL DIPHOSPHINE LIGANDS, PREPARATION METHODS AND USES THEREOF
申请人:Shanghai Institute of Organic Chemistry, Chinese
Academy of Sciences
公开号:EP2876108A1
公开(公告)日:2015-05-27
Disclosed are aromatic spiroketal diphosphine ligands, preparation methods and uses thereof. The ligands have the structure of formula (I), in which R1, R2, R3, R4, R5, R6, R7, R8, X and n are defined as such described in the specification. The aromatic spiroketal diphosphine ligands are prepared from aromatic spiroketal compounds. Also disclosed are the preparation methods of aromatic spiroketal compounds. The preparation methods are simple and can produce racemic or chiral aromatic spiroketal diphosphine ligands. The ligands can be used as catalysts of asymmetrical catalytic reactions having economical practicability and industry application prospect.
本发明公开了芳香族螺酮二膦配体及其制备方法和用途。这些配体具有式(I)结构,其中 R1、R2、R3、R4、R5、R6、R7、R8、X 和 n 的定义如说明书所述。芳香族螺酮二膦配体由芳香族螺酮化合物制备。还公开了芳香族螺酮化合物的制备方法。制备方法简单,可制备外消旋或手性芳族螺酮二膦配体。这些配体可用作不对称催化反应的催化剂,具有经济实用性和工业应用前景。
[EN] DIARYL-Β-LACTAM COMPOUND AND PREPARATION METHOD AND PHARMACEUTICAL USE THEREOF<br/>[FR] COMPOSÉ DE DIARYL-B-LACTAME ET SON PROCÉDÉ DE PRÉPARATION ET UTILISATION PHARMACEUTIQUE ASSOCIÉE<br/>[ZH] 二芳基-β-内酰胺类化合物及其制备方法和在制药中的用途
AbstractA practical procedure has been developed for efficient synthesis of chiral aromatic spiroketals and the relevant diphosphine ligands. The procedure includes first asymmetric hydrogenation of readily available α,α′‐bis(2‐benzyloxyarylidene) ketones catalyzed by the Ir(I)/SpinPHOX (S,S)‐1a (0.5–1 mol%) and subsequent hydrogenative deprotection of the resultant benzyl ethers catalyzed by palladium on carbon (Pd/C), as well as simultaneous spiroketalization of the corresponding diphenolic ketones by (S,S)‐1a in one pot. The corresponding chiral aromatic spiroketals (R,R,R)‐4a–j have been obtained in high yields (77–94%) with good diastereoselectivities (trans/cis=81/19 to 96/4), and excellent enantioselectivities for the trans products (97–>99% ee). In addition, the reaction of aromatic spiroketal difluoride (R,R,R)‐4b with potassiodiarylphosphide (KPAr2) in refluxing tertahydrofuran (THF) has also provided an alternative and practical synthesis of chiral spiroketal‐based diphosphine (SKP) ligands in 78–95% yields on multigram scale.magnified image
PROCESS FOR SYNTHESIS OF EZETIMIBE AND INTERMEDIATES USED IN SAID PROCESS
申请人:Shanghai Institute of Organic Chemistry, Chinese
Academy of Sciences