Novel acid anhydrides and preparation and use thereof

C - Chemistry – Metallurgy – 07 – D

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C07D 305/14 (2006.01) A61K 31/335 (2006.01) C07C 233/87 (2006.01) C07C 271/22 (2006.01) C07C 309/12 (2006.01) C07C 323/63 (2006.01) C07D 263/04 (2006.01) C07F 7/10 (2006.01)

Patent

CA 2126461

Nouveaux anhydrides de formule générale (I), dans laquelle Ar représente un radical aryle, et ou bien R1 représente C6-H5-CO ou (CH3)3C-O-CO, R2 représente un atome d'hydrogène et R3 représente un groupement protecteur de la fonc- tion hydroxy; au bien R1 représente (CH3)3C-O-CO et R2 et R3 forment ensemble un hétérocycle saturé à 5 ou 6 chaînons, leur préparation et leur emploi pour préparer les dérivés du taxane de formule générale (III), (R = H, acétyle; R1 = C6H5-CO ou (CH3)3C-O-CO) qui présentent des propriétés antitumorales.

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