申请人:Berens Ulrich
公开号:US20060030737A1
公开(公告)日:2006-02-09
The present invention relates to a method for the preparation of C
2
-symmetric 1,4-diols of the formula IVA or IVB, wherein ring A, R
1
and R
2
have the meanings given in the specification, that makes use of the metallation of pure enantiomers of α-(aryl or heteroaryl)-α-substituted alkanol compounds or the use of said alkanol compounds in the preparation of said mmetric 1,4-diols; novel C
2
-symmetric 1,4-diols in enantiomerically pure form; and methods of use or their use in the synthesis of chiral ligands which find use to produce catalysts for a variety of asymmetric transformations such as hydrogenations.
本发明涉及一种制备式IVA或IVB的C2对称1,4-二醇的方法,其中环A、R1和R2具有规范中给出的含义,利用纯对映体α-(芳基或杂环芳基)-α-取代烷醇化合物的金属化或利用该烷醇化合物制备所述对称1,4-二醇;新颖的对映纯形式的C2对称1,4-二醇;以及它们在合成手性配体中的应用或用于制备各种不对称转化的催化剂,例如氢化反应。