C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 275/06 (2006.01) C07C 51/06 (2006.01) C07C 51/36 (2006.01) C07C 53/126 (2006.01)
Patent
CA 2331548
Novel intermediates, i.e., N-(2S-(2-propenyl)-octanoyl)-(1S)-(-)-2, 10- camphorsultam, N-(2S-(2-propynyl)octanoyl)-(1S)-(-)-2, 10-camphorsultam and N- (2R-(2-propyl)octanoyl)-(1S)-(-)-2, 10-camphor-sultam; processes for the preparation of the intermediates; and processes for the preparation of optically active 2S-(2-propenyl)octanoic acid, 2S-(2-propynyl)octanoic acid and 2R-propyloctanoic acid by using the same. Optically active 2R- propyloctanoic acid equivalent or superior to that prepared by the process of the prior art in optical purity can be efficiently prepared in shorter reaction steps.
L'invention concerne de nouveaux intermédiaires, tels que N-(2S-(2-propényl)-octanoyl)-(1S)-(-)-2, 10-camphorsultame, N-(2S-(2-propynyl)-octanoyl)-(1S)-(-)-2, 10-camphorsultame et N-(2R-(2-propyl)-octanoyl)-(1S)-(-)-2, 10-camphorsultame. L'invention concerne aussi des procédés de préparation des intermédiaires et des procédés de préparation d'un acide 2S-(2-propényl)octanoïque optiquement actif, d'un acide 2S-(2-propynyle)octanoïque et d'un acide 2R-propyloctanoïque au moyen de ces intermédiaires. L'acide 2R-propyloctanoïque optiquement actif égal ou supérieur à celui préparé par le procédé de l'art antérieur peut être efficacement préparé dans des étapes de réaction plus courtes tout en conservant la même transparence optique.
Ono Pharmaceutical Co. Ltd.
Riches Mckenzie & Herbert Llp
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