Syntheses of N4,2',3',5'-tetraacylcytidines from N4-acylcytosines, via condensation with tetraacylribose and transribosylation with acylated purine nucleosides.
[EN] PREPARATION OF INTERMEDIATES USEFUL IN THE SYNTHEIS OF 2'-CYANO-2'-DEOXY-N4-PALMITOYL-1-BETA-D-ARABINOFURANOSYLCYTOSINE<br/>[FR] PRÉPARATION D'INTERMÉDIAIRES UTILES DANS LA SYNTHÈSE DE 2'-CYANO-2'-DÉSOXY-N4-PALMITOYL-1-BETA-D-ARABINOFURANOSYLCYTOSINE
申请人:CYCLACEL LTD
公开号:WO2009136158A1
公开(公告)日:2009-11-12
The present invention relates to a process for preparing a compound of formula 682-4, said process comprising the steps of: (i) converting a compound of formula 682-1 into a compound of formula 682-2'; (ii) converting said compound of formula 682-2' into a compound of formula 682-3; and (iii) converting said compound of formula 682-3 into a compound of formula 682-4. Further aspects of the invention relate to the use of the above process in the preparation of 2'-cyano-2'-deoxy-N4 -palmitoyl-1-β-D-arabmofuranosylcytosine, a pyrimidine nucleoside which is therapeutically useful in the treatment and/or prevention of cancer.
[EN] INTERMEDIATE AND PROCESSES INVOLVED IN THE PREPARATION OF 2 ' -CYANO-2 ' -DE0XY-N4-PALMIT0YL-1-BETA-ARABIN0FURAN0SYLCYTOSINE<br/>[FR] INTERMÉDIAIRE ET PROCÉDÉS ASSOCIÉS À LA PRÉPARATION DE 2'-CYANO-2'-DÉSOXY-N4-PALMITOYL-1-BÊTA-ARABINOFURANOSYLCYTOSINE
申请人:CYCLACEL LTD
公开号:WO2009136162A1
公开(公告)日:2009-11-12
The present invention relates to a process for preparing a compound of formula (682-6'), said process comprising the steps of: formula (682-4), (682-5), (682-6'): (i) converting a compound of formula (682-4) into a compound of formula (682-5); and (ii) converting said compound of formula (682-5) into a compound of formula (682- 6'). Further aspects of the invention relate to the use of the above process in the preparation of 2'-cyano-2'-deoxy-N4-palmitoyl-l-β-D-arabinofuranosylcytosine, a pyrimidine nucleoside which is therapeutically useful in the treatment and/or prevention of cancer.
Enzymatic production of cytosinic nucleoside analogues
申请人:Plasmia Biotech, S.L.
公开号:EP2883959A1
公开(公告)日:2015-06-17
The invention relates to a new synthesis process of cytosine nucleoside analogues by using nucleoside phosphorylase enzymes, particularly Pyrimidin Nucleoside Phosphorylases (PyNPs) or mixtures of Purine Nucleoside Phosphorylases (PNPs) and PyNPs.
A cytidine derivative of the formula:
wherein R1 is a carboxylic acid-derived acyl having not less than 3 carbon atoms, and R2, R3 and R4 each represents a carboxylic acid-derived acyl, is effectively produced by subjecting a compound of the formula:
wherein R1 is as defined as above and a compound of the formula:
wherein A is a group of the formula -OR5 where R5 is a carboxylic acid-derived acyl, or a halogen, and each of R2, R3 and R' is as defined as above, to condensation in the presence of a Lewis acid.