An Efficient, Scalable Synthesis of the HIV Reverse Transcriptase Inhibitor Ziagen® (1592U89)
摘要:
Ziagen(R), (IS, cis)-4-[2-amino-6-(cyclopropylamino)-9H-purin-9-yl]-2-cyclopentene-1-methanol, was synthesized from (IS,4R)-azabicyclo[2.2.1]hept-5-en-3-one by efficient processes which bypass problematic steps in earlier routes. 2-Amino-4,6-dichloro-5-formamidopyrimidine is a key intermediate which makes possible an efficient construction of the purine from a chiral cyclopentenyl precursor.
An Efficient, Scalable Synthesis of the HIV Reverse Transcriptase Inhibitor Ziagen® (1592U89)
摘要:
Ziagen(R), (IS, cis)-4-[2-amino-6-(cyclopropylamino)-9H-purin-9-yl]-2-cyclopentene-1-methanol, was synthesized from (IS,4R)-azabicyclo[2.2.1]hept-5-en-3-one by efficient processes which bypass problematic steps in earlier routes. 2-Amino-4,6-dichloro-5-formamidopyrimidine is a key intermediate which makes possible an efficient construction of the purine from a chiral cyclopentenyl precursor.
[EN] METHOD FOR SYNTHESIZING DIVERSELY SUBSTITUTED PURINES<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE PURINES À SUBSTITUTIONS DIVERSES
申请人:UNIV GRENOBLE ALPES
公开号:WO2018203099A1
公开(公告)日:2018-11-08
The present invention relates to a method for synthesizing diversely substituted purines starting from a pyrimidine. Formula (I). The method comprises the formation of an amidine group on the pyrimidine by implementing a Vilsmeier type reagent, the functionalization of the pyrimidine with an amine and the cyclization to form the purine nucleus. Optional steps can also be performed in order to further functionalize the molecule. The invention also relates to new purines and new intermediate product.
Highly substituted purines were synthesized in good to high yields through a one-pot straightforward metal-free scalable method, using the Traube synthesis adapted to Vilsmeier-type reagents. From 5-amino-4-chloropyrimidines, new 9-aryl-substituted chloropurines and intermediates for peptide nucleic acid synthesis were prepared. Variant procedures allowing a rapid synthesis of ribonucleosides and 7-benzylpurine
The present invention relates to certain novel pyrimidine intermediates and their salts, processes for their preparation and processes for their conversion to 9-substituted-2-aminopurines which are useful in medical therapy.
A novel pyrimidine derivative, N-(2-amino-4,6-dichloropyrimidine-5-yl)formamide for use, e.g., in the production of antiviral nucleotide derivatives, can be made by a process involving cyclyzing an aminomalonic ester with guanidine or its salt in the presence of a base to produce 2,5-diamino-4,6-dihydroxypyrimidine or its salt, chlorinating this product with a chlorinating agent in the presence of an amide to produce 4,6-dichloropyrimidine, and reacting the 4,6-dichlororpyrimidine with an aqueous solution of a carboxylic acid to produce the N-(2-amino-4,6-dichloropyrimidine-5-yl)formammide. Novel also are 4,6-dichloropyrimidine, 4,6-dichloro-N'-(dimethylaminomethylene)pyrimidine-2,5-diamine, 4,6-dichloro-N'-(piperidine-1-ylmethylene)pyrimidine-2,5-diamine, and a process for making 2,5-diamino-4,6-dichloropyrimidine.
A compound of formula (VI)
A process for the preparation of a compound of formula (VI):
comprising:
reacting a compound of formula (III):
with an amine of formula R3NH2.