Process for preparing vitamin a; new intermediates

Details Process for preparing vitamin a; new intermediates Process for preparing vitamin a; new intermediates

C - Chemistry, Metallurgy

07

C

C07C 403/10 (2006.01) B01J 27/122 (2006.01) B01J 31/30 (2006.01) C07C 35/18 (2006.01) C07C 43/178 (2006.01) C07C 43/303 (2006.01) C07C 403/08 (2006.01) C07C 403/14 (2006.01) C07D 317/20 (2006.01) C07D 319/06 (2006.01) C07B 61/00 (2006.01)

Patent

CA 2141766

La présente invention concerne un procédé de préparation de la vitamine A qui consiste à faire réagir l'éthynyl .beta. ionol avec l'acétal d'un halogénure allylique en C5 en présence d'une quantité catalytique de cuivre, à réaliser une hydrogénation modérée du dérivé obtenu, à éliminer la fonction hydroxyle et à redresser le rétinal obtenu.

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