Patent ID: 7235696

Claim:
Process for preparing compounds of the formula (I) in which *2 and *3 each mark a stereogenic carbon atom which is in R- or S-configuration, although the substituents are arranged in a cisoid manner based on the connecting carbon bond and R 1 , R 2 , R 3 and R 4 may each independently be: alkyl, arylalkyl or aryl or a heterocyclic radical having a total of 4 to 16 carbon atoms, or R 1 and R 2 and/or R 3 and R 4 each together are alkylene or compounds comprising compounds according to formula I and boranes, characterized in that in a step A), compounds of the formula (IIa) or (IIb) in which *3 has the definitions and areas of preference specified for formula (I) are reacted with compounds of the formula (IIIa) or (IIIb) Hal-PR 1 R 2 (IIIa) Hal-PR 3 R 4 (IIIb) to give compounds of the formula (IVa) and (IVb) and in a step B), the compounds of the formula (IVa) and (IVb), optionally in an organic solvent, are converted by heating to at least 60 C to compounds of the formula (Va) and (Vb) and, in a step C), the compounds of the formula (Va) and (Vb) are converted by reacting with a borane and subsequently oxidizing to compounds of the formula (VIa) and (VIb) and, in a step D), the compounds of the formula (VIa) and (VIb) are converted by reducing to compounds of the formula (VIIa) and (VIIb) and, in a step E), the compounds of the formula (VIIa) and (VIIb) are converted by reacting with compounds of the formula (VIII) Hal-O 2 SR 5 (VIII) to compounds of the formula (IXa) and (IXb) and, in a step F), the compounds of the formula (IX) are converted by reacting with compounds of the formula (Xa) or (Xb) HPR 3 R 4 (Xa) HPR 1 R 2 (Xb) to the compounds of the formula (I), where, in the formulae (IIa), (IIb), (IIIa), (IIIb), (IVa), (IVb), (Va), (Vb), (VIa), (VIb), (VIIa), (VIIb), (IXa), (IXb), (Xa) and (Xb), *2 and *3, R 1 , R 2 , R 3 and R 4 are each defined as has been described in by formula I and R 5 in the formulae (VIII), (IXa) and (IXb) is alkyl, fluoroalkyl, arylalkyl or aryl and Hal in the formulae (IIIa) and (IIIb) and (VIII) is in each case chlorine, bromine or iodine.