C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/351.1, 260/3
C07D 317/32 (2006.01) C07C 45/46 (2006.01) C07C 49/807 (2006.01) C07C 51/00 (2006.01) C07D 403/06 (2006.01) C07D 409/04 (2006.01)
Patent
CA 1281029
ABSTRACT OF THE DISCLOSURE Compounds of formula Image (I) wherein Ar is selected from the group consisting of phenyl, diphenyl, naphthyl, thienyl and pyrrolyl which groups may be substituted by a substituent selected from the group consisting of halogen atoms, C1-C4-alkyl, C3-C6-cycloalkyl, benzyl, hydroxy, C1-C4-alkoxy, C1-C4-alkylthio, C1-C4-haloalkyl, C1-C4-haloalkoxy, phenoxy, thienylcarbonyl and benzoyl, R repreents a C1-C4 alkyl; R1 and R2, which may be the same or different, represent a hydroxy, an O-M+, an OR3 or an Image group, R3 represents a C1-C24 alkyl, a C3-C6 cycloalkyl, a phenyl or a benzyl group; M+ represents the cation of an alkaline metal; R4 and R5, equal to or different from each other, represent a hydrogen atom, a C1-C4 alkyl, a C5-C6 cycloalkyl, a (CH2)n-CH2OH group with n=1, 2 or 3, or R4 and R5 together form a group (CH2)m with m=4 or 5; a group -CH2-CH2-R6-CH2-CH2- in which R6 is an oxygen atom, an N-H or N- (C1-C4) alkyl group; X represents a hydroxy, aacetoxy, trifluoro- acetoxy, trichloroacetoxy, benzoyloxy, 4-nitrobenzoyloxy, mesyloxy, benzensulphonyloxy or tosyloxy group, the carbon atoms marked by an asterisk being both contemporaneously in the R or S configuration. The preparation of the compound of formula I by ketalization or by trans-ketalization with tartaric acid derivatives and their rearrangement into alpha-arylalkanoic acids is described too.
478586
Castaldi Graziano
Cavicchioli Silvia
Giordano Claudio
Uggeri Fulvio
Castaldi Graziano
Cavicchioli Silvia
Giordano Claudio
Marks & Clerk
Uggeri Fulvio
LandOfFree
Optically active ketals, processes for their preparation and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optically active ketals, processes for their preparation and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optically active ketals, processes for their preparation and... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1331211