Preparation and purification of citrovorum factor

C - Chemistry – Metallurgy – 07 – D

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260/242.13

C07D 473/18 (2006.01) C07D 475/04 (2006.01) C07D 487/14 (2006.01)

Patent

CA 1108134

PREPARATION AND PURIFICATION OF CITROVORUM FACTOR ABSTRACT OF THE DISCLOSURE Improved methods for the preparation and purifi- cation of citrovorum factor are disclosed. The method includes improved procedures for hydrogenation of 10- formylfolic acid as well as for the reduction of folic acid. Also disclosed are improved procedures for opening of the imidazoline ring, and a non-chromato- graphic method for the purification of crude samples of citrovorum factor.

308616

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