Msd Oss B.v.

Lambertus Gerardus Maria Willems

Martin Ostendorf

Henricus Johannes Franciscus Maas

Process for the preparation of a compound of general formula (II) wherein Rand Rindependently are hydrogen or a hydroxy- or hydrocarbyl group; or wherein Rand Rtogether are a double bonded oxygen; Ris hydrogen; R'is a nitrobenzophenone group; and Rand Rindependently are hydrogen or a hydroxy- or hydrocarbyl group; from a compound of general formula (I) wherein, R, RR, Rand Rare as defined above and Ris hydrogen; wherein the compound of formula (I) is reacted under alkaline conditions with 2-chloro-5-nitrobenzophenone in the presence of an alkanolic solvent and the compound of formula (II) is directly crystallized from this alkanolic solvent. Complex of an alkanol and a compound of general formula (II) obtainable from the above process and processes wherein the above process or complex are used. 

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Oss, Netherlands

Lambertus Gerardus Maria Willems