C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/492, 260/464
C07C 69/16 (2006.01) C07C 69/63 (2006.01) C07C 309/63 (2006.01)
Patent
CA 1305169
- 13 - O.Z. 0050/38855 Abstract of the Disclosure: Compounds of the formula I Image I where R1 is Image or Image where A is C1-C4 alkyl, phenyl or C7-C12-aralkyl and l is 0 or 1, R2 is C1-C4-alkyl, n is 0, 1, 2 or 3, m is 1, 2 or 3 and Y is hydrogen, fluorine, chlorine, brom- ine, C1-C3-alkyl, C1-C3-alkoxy, trifluoromethyl, phenyl or phenoxy, and, when m is greater than 1, the individual atoms or groups Y are identical or different, are pre- pared by a process in which, in a first stage, a diester of the formula II Image II is hydrolyzed with one equivalent of an aqueous alkali metal hydroxide to give the alcohol of the formula IIIa Image IIIa, in a second stage this alcohol is converted with a halo- genating agent or a sulfonyl chloride or bromide into a compound of the formula IIIb Image IIIb where X is a nucleophilically displaceable leaving group, such as chlorine, bromine, mesyl or tosyl, and then, in a third stage, the compound IIIb is reacted with a pheno- late of the formula IV Image IV - 14 - O.Z. 0050/38855 where Y and m have the abovementioned meanings, in the presence of an aprotic solvent to give compound I. Fur- thermore, diesters of the formula II and a process for their preparation are provided, the said diesters being prepared by reacting a lactone of the formula V Image v with a Grignard compound VI R1MgZ VI where 2 is chlorine or bromine, in a nonpolar organic solvent, from 2 to 3 moles of the Grignard compound being used per mole of lactone, and the reaction mixture then being treated with from 2 to 3 moles of anhydride VII Image VII per mole of lactone.
554124
Sauter Hubert
Schulz Guenter
Basf Aktiengesellschaft
Robic
Sauter Hubert
Schulz Guenter
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