摘要:
1,1′-Biphenyl-2,2′-diphosphines having at least one amine substituent in the para position relative to the phosphine group and having the formulae are ligands for metal complexes which serve as catalysts for asymmetric addition reactions of prochiral organic compounds and whose catalytic properties can be tailored specifically to particular substrates by substitution of the amine group.
摘要:
The invention relates to compounds of formula (I) provided in the form of racemic compounds, mixtures of diastereomers or essentially pure diastereomers, wherein R1 represents a hydrogen atom or C1-C4-alkyl, and at least one secondary phosphine depicts an unsubstituted or substituted cyclic phosphine group, or phosphonium salts thereof having one or two monovalent anions or a divalent anion. The compounds of formula (I) can be obtained by means of a novel method and are valuable ligands for catalytically active metal complexes in asymmetrical synthesis
摘要:
The invention relates to compounds having a structural element of formula (I) in an aromatic hydrocarbon ring, wherein: M represents —Li, —MgX3, (C1-C18-Alkyl)3Sn—, —ZnX3 or —B(O—C1-C4-Alkyl)2; X1 and X2, independent of one another, represent O or N, and C-bound hydrocarbon radicals or heterohydrocarbon radicals are bound to the free bonds of the O and N atoms; group —C═C—, together with C atoms, forms a hydrocarbon aromatic compound and represents X3 Cl, Br or I. The inventive compounds are easily obtained by directly substituting the hydrogen in the ortho position to the P atom with metalation reagents. The metal atoms can then be substituted by a reactive electrophilic compound. The group —P(X1—)(X2—) - - - -(BH3)0,1 can then be converted into a secondary phosphine group. The inventive method enables the production of monophosphines and diphosphines even on a large scale, which are valuable ligands for metal complexes serving as catalysts for, e.g. enantioselective hydrogenations.
摘要:
Compounds of the formula I or I′, where the radicals R1 are each, independently of one another, a hydrogen atom or C1-C4-alkyl and R′1, is C1-C4-alkyl; X1 and X2 are each, independently of one another, a sec-phosphino group; R2 is hydrogen, R01R02R03Si— is halogen-, hydroxyl-, C1-C8-alkoxy- or R04R05N-substituted C1-C18-acyl or is R06—X01—C(O)—; R01, R02 and R03 are each, independently of one another, C1-C12-alkyl, unsubstituted or C1-C4-alkyl- or C1-C4-alkoxy-substituted C6-C10-aryl or C7-C12-aralkyl; R04 and R05 are each, independently of one another, hydrogen, C1-C12-alkyl, C3-C8-cycloalkyl, C6-C10-aryl or C7-C12-aralkyl, or R04 and R05 together are trimethylene, tetramethylene, pentamethylene or 3-oxapentylene; R06 is C1-C18-alkyl, unsubstituted or C1-C4-alkyl- or C1-C4-alkoxy-substituted C3-C8-cycloalkyl, C6-C10-aryl or C7-C12-aralkyl; X01 is —O— or —NH—; T is C-bonded C3-C20-heteroarylene; v is 0 or an integer from 1 to 4; X1 in the heteroring of the heteroarylene is bound in the ortho position relative to the T—C* bond; and * indicates a mixture of racemic or enantiomerically pure diastereomers or pure racemic or enantiomerically pure diastereomers. The compounds are excellent chiral ligands for metal complexes as enantioselective catalysts for the hydrogenation of prochiral organic compounds.
摘要:
Process for preparing a catalyst solution by reacting metal complexes and diphosphines in the presence of an inert organic solvent, which is characterized in that a) an uncharged or cationic metal complex having a TM8 metal as central atom, and b) a salt of a chiral ditertiary diphosphine which has one or two phospholane groups which are bound to a carbon chain having from 2 to 4 carbon atoms and contain anions selected from the group consisting of RCCOO−, RCSO3−, BF4−, PF6−, AsF6−, SbF6−, B(C6F5)4− and B(3,5-bistrifluoromethylphenyl)4−, are reacted with one another, where the ratio of the components a) and b) is from 1:1 to 1:2 and RC is C1-C6-haloalkyl, C5-C10-halocycloalkyl or C6-C10-haloaryl.
摘要翻译:一种在惰性有机溶剂存在下使金属配合物和二膦反应制备催化剂溶液的方法,其特征在于:a)具有TM8金属作为中心原子的不带电荷或阳离子金属络合物,和b)手性 具有一个或两个磷酸基团的二重二膦,其与具有2至4个碳原子的碳链结合并含有选自RCCOO-,RCSO3-,BF4-,PF6-,AsF6-,SbF6-, B(C 6 F 5)4-和B(3,5-双三氟甲基苯基)4-彼此反应,其中组分a)和b)的比例为1:1至1:2,RC为C1-C6 C 5 -C 10 - 卤代环烷基或C 6 -C 10 - 卤代芳基。
摘要:
Compounds of the formula (I), in which R1 is C1-C4alkyl, C6-C10aryi or C7-C11, aralkyl, R2 is an open-chain or cyclic secondary amino group, and R is a radical of the formula in which R3 is C1-C4alkyl or C1-C4alkoxy, and R4 is H, C1-C4alkyl or C1-C4alkoxy, are ligands for metal complexes as homogeneous hydrogenation catalysts for prochiral organic compounds containing double bonds, by means of which a very high activity and productivity and also enantioselectivity can be achieved
摘要:
Compounds of the formula (1), in which R1 is C1-C4alkyl, C6-C10aryi or C7-C11,aralkyl, R2 is an open-chain or cyclic secondary amino group, and R is a radical of the formula in which R3 is C1-C4alkyl or C1-C4alkoxy, and R4 is H, Cl-C4alkyl or C1-C4alkyloxy, are ligands for metal complexes as homogeneous hydrogenation catalysts for prochiral organic compounds containing double bonds, by means of which a very high activity and productivity and also enantioselectivity can be achieved.
摘要:
A compound of the formula I or I′, where the radicals R1 are each, independently of one another, a hydrogen atom or C1-C4-alkyl and R′1 is C1-C4-alkyl; X1 and X2 are each, independently of one another, a sec-phosphino group; R2 is (1) hydrogen, (2) R01R02R03Si—, (3) C1-C18-acyl substituted with halogen, hydroxyl, C1-C8-alkoxy or R04R05N—, or (4) R06—X01—C(O)—; R01, R02 and R03 are each, independently of one another, C1-C12-alkyl, unsubstituted or C1-C4-alkyl- or C1-C4-alkoxy-substituted C6-C10-aryl or C7-C12-aralkyl; R04 and R05 are each, independently of one another, hydrogen, C1-C12-alkyl, C3-C8-cycloalkyl, C6-C10-aryl or C7-C12-aralkyl, or R04 and R05 together are trimethylene, tetramethylene, pentamethylene or 3-oxapentylene; R06 is C1-C18-alkyl, unsubstituted or C1-C4-alkyl- or C1-C4-alkoxy-substituted C3-C8-cycloalkyl, C6-C10-aryl or C7-C12-aralkyl; X01 is —O— or —NH—; T is C-bonded C3-C20-heteroarylene; v is 0 or an integer from 1 to 4; X1 in the heteroring of the heteroarylene is bound in the ortho position relative to the T—C* bond; and * indicates a mixture of racemic or enantiomerically pure diastereomers or pure racemic or enantiomerically pure diastereomers.
摘要:
Process for preparing a catalyst solution by reacting metal complexes and diphosphines in the presence of an inert organic solvent, which is characterized in that a) an uncharged or cationic metal complex having a TM8 metal as central atom, and b) a salt of a chiral ditertiary diphosphine which has one or two phospholane groups which are bound to a carbon chain having from 2 to 4 carbon atoms and contain anions selected from the group consisting of RCCOO−, RCSO3−, BF4−, PF6−, AsF6−, SbF6−, B(C6F5)4− and B(3,5-bistrifluoromethylphenyl)4−, are reacted with one another, where the ratio of the components a) and b) is from 1:1 to 1:2 and RC is C1-C6-haloalkyl, C5-C10-halocycloalkyl or C6-C10-haloaryl.
摘要:
The invention relates to compounds having a structural element of formula (I) in an aromatic hydrocarbon ring, wherein: M represents —Li, —MgX3, (C1-C18-Alkyl)3Sn—, —ZnX3 or —B(O—C1C4-Alkyl)2; X1 and X2, independent of one another, represent O or N, and C-bound hydrocarbon radicals or heterohydrocarbon radicals are bound to the free bonds of the O and N atoms; group —C═C—, together with C atoms, forms a hydrocarbon aromatic compound and represents X3 Cl, Br or I. The inventive compounds are easily obtained by directly substituting the hydrogen in the ortho position to the P atom with metalation reagents. The metal atoms can then be substituted by a reactive electrophilic compound. The group —P(X1—)(X2—) - - - (BH3)0,1 can then be converted into a secondary phosphine group. The inventive method enables the production of monophosphines and diphosphines even on a large scale, which are valuable ligands for metal complexes serving as catalysts for, e.g. enantioselective hydrogenations.