公开(公告)号：DE3260326D1

公开(公告)日：1984-08-09

申请号：DE3260326

申请日：1982-04-08

Applicant: BASF AG

Inventor： RUECHARDT CHRISTOPH DR ,  JAEHME JOACHIM ,  SALZ ULRICH

IPC: C07C67/46 ,  C07B31/00 ,  C07B41/08 ,  C07B53/00 ,  C07C27/00 ,  C07C27/02 ,  C07C51/09 ,  C07C57/30 ,  C07C57/58 ,  C07C59/64 ,  C07C59/68 ,  C07C67/00 ,  C07C69/612 ,  C07C69/635 ,  C07C69/708 ,  C07C69/712

Abstract: Optically active carboxylic acids I where R1 is an organic radical which is linked to the asymmetric C' atom via a carbon atom and R2 is one of the radicals R1 (but not the same radical), halogen or an organic radical which is bonded to the asymmetric C' atom via an oxygen atom, are prepared by reacting a ketene II II with an alcohol in a homogeneous liquid phase in the presence of a tertiary amine III and then converting the resulting ester into the acid, using an optically active alcohol IV.

公开(公告)号：HU186861B

公开(公告)日：1985-10-28

申请号：HU129082

申请日：1982-04-23

Applicant: BASF AG

Inventor： RUCHARDT CHRISTOPH ,  JAEHME JOACHIM ,  SALZ ULRICH

IPC: C07C67/46 ,  C07B31/00 ,  C07B41/08 ,  C07B53/00 ,  C07C27/00 ,  C07C27/02 ,  C07C51/09 ,  C07C57/30 ,  C07C57/58 ,  C07C59/64 ,  C07C59/68 ,  C07C67/00 ,  C07C69/612 ,  C07C69/635 ,  C07C69/708 ,  C07C69/712

Abstract: Optically active carboxylic acids I where R1 is an organic radical which is linked to the asymmetric C' atom via a carbon atom and R2 is one of the radicals R1 (but not the same radical), halogen or an organic radical which is bonded to the asymmetric C' atom via an oxygen atom, are prepared by reacting a ketene II II with an alcohol in a homogeneous liquid phase in the presence of a tertiary amine III and then converting the resulting ester into the acid, using an optically active alcohol IV.

公开(公告)号：CA1181766A

公开(公告)日：1985-01-29

申请号：CA399834

申请日：1982-03-30

Applicant: BASF AG

Inventor： RUECHARDT CHRISTOPH ,  JAEHME JOACHIM ,  SALZ ULRICH

IPC: C07C67/46 ,  C07B31/00 ,  C07B41/08 ,  C07B53/00 ,  C07C27/00 ,  C07C27/02 ,  C07C51/09 ,  C07C57/30 ,  C07C57/58 ,  C07C59/64 ,  C07C59/68 ,  C07C67/00 ,  C07C69/612 ,  C07C69/635 ,  C07C69/708 ,  C07C69/712 ,  C07C59/115

Abstract: Optically active carboxylic acids I where R1 is an organic radical which is linked to the asymmetric C' atom via a carbon atom and R2 is one of the radicals R1 (but not the same radical), halogen or an organic radical which is bonded to the asymmetric C' atom via an oxygen atom, are prepared by reacting a ketene II II with an alcohol in a homogeneous liquid phase in the presence of a tertiary amine III and then converting the resulting ester into the acid, using an optically active alcohol IV.

公开(公告)号：DE3428622A1

公开(公告)日：1985-02-14

申请号：DE3428622

申请日：1984-08-03

Applicant: BASF AG

Inventor： RUECKARDT CHRISTOPH PROF DR ,  FRANCK AMELIE ,  GAERTNER HOLGER ,  SALZ ULRICH ,  SCHICKINGER KARIN

IPC: C07C51/487 ,  C07C57/30 ,  C07C57/58 ,  C07C59/64 ,  C07C59/68 ,  C07C59/84

Abstract: Preparation of optically active carboxylic acids of the general formula I in which Ar represents a substituted or unsubstituted phenyl or naphthyl group, n can be zero or 1 and R represents a hydrocarbon radical having 1-6 C atoms, by reacting a statistically stereoisomeric anhydride I', which has been prepared from racemic I, with an optically active alcohol in organic solution and in the presence of a tertiary organic base, the optically active alcohol used being a 1-pyridylalkanol of the general formula II in which R represents a C1-C4-alkyl group and which simultaneously acts as the base.