Process for the preparation of indole derivatives and...

C - Chemistry – Metallurgy – 07 – D

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C07D 209/18 (2006.01) C07D 209/04 (2006.01) C07D 209/24 (2006.01) C07D 209/30 (2006.01)

Patent

CA 2407862

A process for the preparation of compounds of formula (1), wherein R1 is C1- C6alkyl and X is hydrogen, a hydrocarbon radical or a cation, wherein a compound of formula (2), wherein R1 is as defined above and R2 is hydrogen or a hydrocarbon radical, is reduced, the resulting compound of formula (3) is reacted with a compound that introduces the radical of formula -CH2-COOR3, wherein R3 has the meanings given above for R2, and the resulting compound of formula (4) is reduced and optionally hydrolysed.

La présente invention concerne un processus de préparation de composés représentés par les formules (1), (2), (3) et (4). Dans la formule (1) R¿1? est C¿1?-C¿6? alkyle et X est hydrogène, un radical hydrocarbure ou un cation. Dans la formule (2), R¿1? est tel que définit ci-dessus et R¿2? est hydrogène ou un radical hydrocarbure, et ce composé est réduit. Le composé qui en résulte, représenté par la formule (3), réagit avec un composé qui introduit le radical représenté par la formule -CH¿2?-COOR¿3?. Dans cette formule R¿3? est tel que R¿2? est décrit ci-dessus et le composé qui en résulte représenté par la formule (4) est réduit et éventuellement hydrolysé.

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