Process for the preparation of 4-methyl-7-aminoquinolones

C - Chemistry – Metallurgy – 07 – D

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C07D 215/38 (2006.01) C07C 211/52 (2006.01) C07C 235/80 (2006.01)

Patent

CA 2467511

The present invention relates to a process for the preparation of a compound of the general formula (I), which comprises converting a compound of the general formula (II), in an aprotic organic solvent in the presence of a catalytically active amount of a strong acid (catalyst) or of an agent that liberates a strong acid or of an ammonium salt of a strong acid, it also being possible for the catalyst to be part of the starting material/product, into a compound of formula I, wherein R5, R6 and R8 are each independently of the others a hydrogen atom, a nitro group, a sulfo group, a halogen atom, a pseudohalogen, a group COOR1 or CONHR2 or a C1-8 alkyl, C1-8 alkoxy or aryloxy radical, an amide group, a thioalkyl or thioaryl radical, an alkyl- or aryl- sulfonyl radical, an alkyl- or aryl-sulfinyl radical, a trifluoromethyl group or a phosphono group, R1 and R2 being a hydrogen atom or a C1-8 alkyl radical or an aryl or aralkyl radical, R10 is a group -C(O)CH2C(O)CH3 and R11 is a hydrogen atom or an acyl radical, or R10 and R11 are a group -C(O)CH2C(O)CH3. The process according to the invention is simple to perform and results in products of high chemical purity and high isomeric purity in a high yield.

La présente invention concerne une méthode de préparation d'un composé de la formule générale (I), qui consiste à transformer un composé de la formule générale (II) présent dans un solvant organique aprotique, en présence d'une quantité catalytiquement active d'un (catalyseur) d'acide fort, ou d'un agent qui libère un acide fort, ou d'un sel d'ammonium d'un acide fort (ledit catalyseur pouvant également être un constituant d'un produit de départ/matière première) en un composé de la formule (I), dans laquelle R?5¿, R?6¿ et R?8¿ sont chacun, indépendamment des autres, un atome d'hydrogène, un groupe nitro, un groupe sulfo, un atome d'halogène, un pseudo-halogène, un groupe COOR?1¿ ou CONHR?2¿ ou un alkyle C¿1-8?, un alcoxy C¿1-8? ou un radical aryloxy, un groupe amide, un radical thioalkyle or thioaryle, un radical alkyl- ou aryl-sulfonyle, un radical alkyl- ou aryl-sulfinyle, un groupe trifluorométhyle ou un groupe phosphono; R?1¿ et R?2¿ sont un atome d'hydrogène ou un radical alkyle C¿1-8? ou un radical aryle ou aralkyle; R?10¿ est un groupe -(O)CH¿2?C(O)CH¿3?; et R?11¿ est un atome d'hydrogène ou un radical acyle; ou R?10¿ et R?11¿ sont un groupe -C(O)CH¿2?C(O)CH¿3?. La méthode de l'invention est simple à mettre en oeuvre et donne des produits d'une grande pureté chimique et d'une grande pureté isomérique pour un rendement élevé.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process for the preparation of 4-methyl-7-aminoquinolones does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of 4-methyl-7-aminoquinolones, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of 4-methyl-7-aminoquinolones will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1574025

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.