Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Patent
1993-01-21
1994-03-15
Ford, John M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
544332, C07D23942, C07D23952, C07D23930
Patent
active
052947106
ABSTRACT:
N-5-protected 2,5-diamino-4,6-dichloropyrimidines of general formula: ##STR1## wherein R is an alkoxy group or a trifluorometyl group, are valuable intermediate products for the production of pharmaceutical agents with antiviral properties. The above-mentioned compounds are produced by cyclization of an N protected amino malonic acid ester with guanidine in the presence of an alkali alcoholate and then chlorination of the resulting N-5-protected 4,6-dihydroxy-2,5-diaminopyrimidine.
REFERENCES:
Legraverend et al., Synthesis, (1990), pp. 587 to 599.
Greene, Theodora W., "Protective Groups In Organic Synthesis", John Wiley & Sons (1981).
Previdoli Felix
Stucky Gerhard
Ford John M.
Lonza Ltd.
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