Abstract:
The present invention relates to a method for reacting compounds, comprising at least one carbon-carbon or carbon-heteroatom double bond, by 1,2-addition in the presence of a catalyst, comprising at least one transition metal complex having at least two ligands, which each have a pnicogen atom-containing group and at least one functional group enable to form intermolecular, non-covalent bonds, in the presence of a halogenated solvent, which has at least one heteroatom different from halogen. The present invention further relates to a method for producing chiral compounds in the presence of the above-described catalysts and solvents, and to the use of these catalysts in the presence of such solvents.
Abstract:
The present invention relates to a process for asymmetric synthesis in the presence of a chiral catalyst comprising at least one complex of a metal of transition group VIII with ligands capable of dimerization via noncovalent bonds, such catalysts and their use.
Abstract:
The present invention relates to a process for the hydroformylation of compounds of the formula (I), where X is C, P(Rx), P(O—Rx) S or S(═O), where Rx is H, alkyl, cycloalkyl, heterocycloalkyl, aryl or hetaryl; A is a divalent bridging group having from 1 to 4 bridging atoms; and R1 is H, alkyl, alkenyl, alkynyl, cycloalkyl, heterocycloalkyl, aryl or hetaryl; or salts thereof; in which the compound of the formula (I) is reacted with carbon monoxide and hydrogen in the presence of a catalyst comprising a complex of a metal of transition group VIII with a compound of the formula (II), where Pn is a pnicogen atom; W is a divalent bridging group having from 1 to 8 bridging atoms; R2 is a functional group capable of forming an intermolecular, noncovalent bond with the group —X(═O)OH; R3, R4 are each alkyl, cycloalkyl, heterocycloalkyl, aryl or hetaryl; a, b, c are each 0 or 1; and Y1, Y2 and Y3 are each O, S, NRa or SiRbRc; and also compounds of the formula (II.a), where W′ is a divalent bridging group having from 1 to 5 bridging atoms between the flanking bonds, Z is O, S, S(═O), S(═O)2, N(RIX) or C(RIX)(RX); and RI to RX are each, independently of one another, H, halogen, nitro, cyano, amino, alkyl, etc.; or two radicals RI, RII, RIV, RVI, RVIII and RIX together represent the second part of a double bond.
Abstract:
Procedimiento para la obtención de compuestos quirales a través de la conversión de un compuesto proquiral, que contiene, al menos, un doble enlace insaturado etilénicamente, con un sustrato, en presencia de un catalizador quiral, que comprende, al menos, un complejo de metal de transición con ligandos, que presentan, respectivamente, un grupo que contiene átomos pnicógenos o átomos pseudopnicógenos y, al menos, un grupo funcional apto para formar un enlace intermolecular no covalente, asimismo, el complejo presenta ligandos dimerizados a través de enlaces intermoleculares no covalentes.
Abstract:
The present invention relates to a process for asymmetric synthesis in the presence of a chiral catalyst comprising at least one complex of a metal of transition group VIII with ligands capable of dimerization via noncovalent bonds, such catalysts and their use.