Vitamin d precursors, method and intermediates

Details Vitamin d precursors, method and intermediates Vitamin d precursors, method and intermediates

C - Chemistry, Metallurgy

07

F

C07F 7/18 (2006.01) C07C 35/14 (2006.01) C07C 69/013 (2006.01) C12P 41/00 (2006.01)

Patent

CA 2393617

The invention relates to precursors of the A-ring of vitamin D, of formula (I): in which A, R, R1 and R2 are as defined in the specification. The invention also relates to a method of preparing compounds (I) comprising the enzymatic asymmetrisation of 3,5-dihydroxybenzoic acid derivatives, as well as intermediates of preparation of said compounds.

L'invention concerne des précurseurs du noyau A de la vitamine D, représentés par la formule (I), dans laquelle A, R, R1 et R2 représentent leur définition énoncée dans le descriptif. Elle concerne également un procédé de préparation de composés (I), ce qui consiste à effectuer l'asymétrisation enzymatique de dérivés d'acide 3,5-dihydroxybenzoïque, ainsi que des intermédiaires de préparation desdits composés.

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