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    • 28. 发明授权
    • Ligands for asymmetric reactions
    • 不对称反应配体
    • US07407910B2
    • 2008-08-05
    • US11473035
    • 2006-06-23
    • Ulrich Berens
    • Ulrich Berens
    • B01J27/00C07D233/00
    • C07F15/008B01J31/1845B01J31/1865B01J31/187B01J31/226B01J31/2471B01J2231/321B01J2231/323B01J2231/52B01J2231/643B01J2531/80B01J2531/821B01J2531/822B01J2531/824B01J2531/827B01J2531/828B01J2531/845B01J2531/847C07B53/00C07C45/505C07F9/6506C07F9/65517C07F9/655354C07F9/65683C07F9/65719C07F15/00C07F15/0073
    • The invention relates to a process for the manufacture of bidentate ligands of the formula IA and IIA, characterized in that N,N-(optionally substituted) dialkylamino phosphines bound to an aromatic carbon are lithiated in ortho-position and the lithiated compounds are further converted to said bidentate ligands: wherein X1 is NR, O or S; X2 is CHR1 or CR1; X3 is CHR2 or NR2 or, if X2 is CR1, X3 is CR2 or N; and R, R1 and R2 are radicals such as alkyl groups or R1 and R2 together form an annealed ring; Y1*, Y2* and Y1′* are, independently of each other, an element of the fifth group of the periodic table of elements as such or in thioxo or oxo form; Z1*, Z2*, Z3*, Z4*, Z1′*, Z2′* are, independently of each other, for example halogen, hydrogen, or an unsubstituted or substituted moiety selected from radicals such as alkyl groups; the substituents have otherwise the meanings given in the specification; and the ligands are capable of forming metal complexes, which can be used as catalysts in stereoselective synthesis, especially hydrogenation, of various organic molecules.
    • 本发明涉及制备式IA和IIA的二齿配体的方法,其特征在于与邻位连接的与芳族碳键合的N,N-(任选取代的)二烷基氨基膦进一步转化,并且锂化合物进一步转化 所述二齿配体:其中X 1是NR,O或S; X 2是CHR 1或CR 1; X 3是CHR 2或NR 2 2,或者如果X 2是CR 1,则 >,X 3是CR 2 N或N; 和R 1,R 1和R 2是基团,例如烷基或R 1和R 2共同形成 退火环; Y 1 *,Y 2 *和Y 1 *彼此独立地是元素周期表第五组元素 元素,或硫代或氧代形式; Z 1,Z 2,Z 3,Z 4,Z 1,Z 3, Z 2是独立的,例如卤素,氢或选自基团如烷基的未取代或取代的部分; 取代基另有说明书中给出的含义; 并且配体能够形成金属络合物,其可以用作各种有机分子的立体选择性合成,特别是氢化中的催化剂。