Abstract:
Catalysts suitable for asymmetric hydrogenation reactions is described comprising the reaction product of a group (8) transition metal compound a chiral phosphine and a chiral diamine of formula (1) in which R , R R or R are independently hydrogen, a saturated or unsaturated alkyl, or cycloalkyl group, an aryl group, a urethane or sulphonyl group and R , R , R or R are independently hydrogen, a saturated or unsaturated alkyl or cycloalkyl group, or an aryl group, at least one of R , R , R or R is hydrogen and A is a linking group comprising one or two substituted or unsubstituted carbon atoms.
Abstract translation:描述了适合于不对称氢化反应的催化剂,其包含组(8)过渡金属化合物,手性膦和式(1)的手性二胺的反应产物,其中R 1,R 2 R 3或R R 4,R 7或R 8独立地为氢,饱和或不饱和的烷基或环烷基,芳基,氨基甲酸酯或磺酰基,并且R 5,R 6,R 7或R 8独立地为氢, 饱和或不饱和的烷基或环烷基,或芳基,R 1,R 2,R 3或R 4中的至少一个为氢且A为包含一个或两个取代基 或未被取代的碳原子。
Abstract:
A solid catalyst for asymmetric hydrogenation reactions is disclosed comprising a chiral cationic metal-ligand complex immobilised on a mesoporous alumino-silicate support. The catalyst is formed by ion exchange with the acid sites of the support. The catalyst is reusable, and maintains its activity after use. The metal is preferably Rh, Ir or Ru. The ligands are preferably neutral ligands selected from the group consisting of BINAP, DuPHOS, BIPHEP, TMBTP, BITIANAP, BIBFUP, bppm, CARBOPHOS, JOSIPHOS, BPE, DEGPHOS, DIOP, BIPNOR, DIPAMP, CHIRAPHOS, PROPHOS, PYPHOS, BINAPAN, SELKE or formula (I), formula (II), formula (III).
Abstract:
Catalysts suitable for asymmetric hydrogenation reactions is described comprising the reaction product of a group (8) transition metal compound a chiral phosphine and a chiral diamine of formula (1) in which R 1 , R 2 R 3 or R 4 are independently hydrogen, a saturated or unsaturated alkyl, or cycloalkyl group, an aryl group, a urethane or sulphonyl group and R 5 , R 6 , R 7 or R 8 are independently hydrogen, a saturated or unsaturated alkyl or cycloalkyl group, or an aryl group, at least one of R 1 , R 2 , R 3 or R 4 is hydrogen and A is a linking group comprising one or two substituted or unsubstituted carbon atoms.
Abstract:
A substituted paracyclophane is described of formula (I) wherein X l and X 2 are linking groups comprising between 2 to 4 carbon atoms, Y 1 and Y 2 are selected from the group consisting of hydrogen, halide, oxygen, nitrogen, alkyl, cycloalkyl , aryl or heteroaryl, Z 1 , Z 2 and Z 3 are substituting groups that optionally contain functional groups, a, b, c, d, e and f are 0 or l and a + b + c + d + e + f = 1 to 6. PreferablyX 1 and X 2 are -(C 2 H 4 )- and a + b + c + d + e + f = 1 or 2. The substituted paracyclophane provides transition metal catalysts that demonstrate high activity and selectivity for asymmetric reactions.
Abstract translation:描述了式(I)的式(I)化合物,其中X 1和X 2为包含2至4个碳原子的连接基团,Y 1和Y 2选自氢,卤化物 ,氧,氮,烷基,环烷基,芳基或杂芳基,Z 1,Z 2和Z 3代表任选地含有官能团的基团,a,b,c,d,e和f为0或 1和a + b + c + d + e + f = 1〜6。优选X 1和X 2为 - (C 2 H 4) - 和a + b + c + d + e + f = 1或2。 取代的对环烷烃提供过渡金属催化剂,其表现出对不对称反应的高活性和选择性。
Abstract:
A tethered ligand comprising the reaction product of an organofunctional silica and a ligand containing a functional group capable of reaction with said organofunctional silica, wherein the organofunctional silica is prepared from an alkyl silicate and an organofunctional silane is described. A supported catalyst is also described comprising additionally a source of catalytically-active metal. Methods for preparing the tethered ligand and supported catalyst are provided and uses of the supported catalyst for performing asymmetric reactions are claimed. The catalysts are readily separable from the reaction mixtures and may be re-used if desired.
Abstract:
An immobilised nitrogen-containing ligand is described comprising the reaction product of a compound of formula (I) wherein R 5 , R 6 , R 7 and R 8 are independently hydrogen, a saturated or unsaturated C1-C10 alkyl group, an aryl group, a urethane group, a sulphonyl group or form an imine group, R 1 , R 2 , R 3 , and R 4 are independently hydrogen, a saturated or unsaturated C1-C10 alkyl group or an aryl group and at least one of R 1 , R 2 , R 3 and R 4 is functionalised with a functional group, and a solid support having a site capable of reacting with said functional group. The nitrogen-containing ligand is useful for preparing immobilised catalysts for performing e.g. asymmetric catalysis.
Abstract:
An immobilised nitrogen-containing ligand is described comprising the reaction product of a compound of formula (I) wherein R , R , R and R are independently hydrogen, a saturated or unsaturated C1-C10 alkyl group, an aryl group, a urethane group, a sulphonyl group or form an imine group, R , R , R , and R are independently hydrogen, a saturated or unsaturated C1-C10 alkyl group or an aryl group and at least one of R , R , R and R is functionalised with a functional group, and a solid support having a site capable of reacting with said functional group. The nitrogen-containing ligand is useful for preparing immobilised catalysts for performing e.g. asymmetric catalysis.
Abstract:
A solid catalyst for asymmetric hydrogenation reactions is disclosed comprising a chiral cationic metal-ligand complex immobilised on a mesoporous alumino-silicate support. The catalyst is formed by ion exchange with the acid sites of the support. The catalyst is reusable, and maintains its activity after use. The metal is preferably Rh, Ir or Ru. The ligands are preferably neutral ligands selected from the group consisting of BINAP, DuPHOS, BIPHEP, TMBTP, BITIANAP, BIBFUP, bppm, CARBOPHOS, JOSIPHOS, BPE, DEGPHOS, DIOP, BIPNOR, DIPAMP, CHIRAPHOS, PROPHOS, PYPHOS, BINAPAN, SELKE or formula (I), formula (II), formula (III).