Patent ID: 7442842
Filing Date: 2008-10-28
Classification: B01J,C07B,C07F

Abstract:
1. A process for preparing chiral compounds by reacting a prochiral compound comprising at least one ethylenically unsaturated double bond with a substrate in the presence of a chiral catalyst comprising at least one transition metal complex with ligands which each have a pnicogen-comprising or pseudopnicogen-comprising group and at least one functional group capable of forming intermolecular, noncovalent bonds, with the complex comprising ligands dimerized via intermolecular noncovalent bonds, wherein the ligands comprise at least one structural element of the formula I.a or I.b or tautomers thereof, where Pn is selected from a pnicogen atom or a coordinating atom of a pseudopnicogen-comprising group, R R R X is a C1-C5-alkylene bridge which, depending on the number of bridge atoms, may have one or two double bonds and/or one, two, three or four substituents selected from among alkyl, cycloalkyl, heterocycloalkyl, aryl, hetaryl, carboxylate, sulfonate, phosphonate, NE1 E2 (E1, E2=hydrogen, alkyl, cycloalkyl, acyl or aryl), hydroxy, thiol, halogen, nitro, acyl and cyano, Y is O, S or NR where two or more of the radicals X and R