Synthesis and antitumor activity of 2,4-diamino-6-(2,5-dimethoxybenzyl)-5-methylpyrido[2,3-d]pyrimidine
摘要:
The synthesis of 2,4-diamino-6-(2,5-dimethoxybenzyl)-5-methylpyrido[2,3-d]pyrimidine (BW301U, 7) by a route that has general applicability to the preparation of many 6-(substituted benzyl)-5-methylpyrido[2,3-d]pyrimidines is described. The key intermediate, 2,4-diamino-7,8-dihydro-6-(2,5-dimethoxybenzyl)-5-methyl-7-oxopyrido[2,3-d]pyrimidine (4), is converted to the 7-chloro compound 5 by treatment with a 1:1 complex of N,N-dimethylformamide--thionyl chloride, and 5 is hydrogenolyzed with palladium on charcoal in the presence of potassium hydroxide to yield 7. BW301U is a potent lipid-soluble inhibitor of mammalian dihydrofolate reductase and has significant activity against the Walker 256 carcinosarcoma in rats.
Synthesis and antitumor activity of 2,4-diamino-6-(2,5-dimethoxybenzyl)-5-methylpyrido[2,3-d]pyrimidine
摘要:
The synthesis of 2,4-diamino-6-(2,5-dimethoxybenzyl)-5-methylpyrido[2,3-d]pyrimidine (BW301U, 7) by a route that has general applicability to the preparation of many 6-(substituted benzyl)-5-methylpyrido[2,3-d]pyrimidines is described. The key intermediate, 2,4-diamino-7,8-dihydro-6-(2,5-dimethoxybenzyl)-5-methyl-7-oxopyrido[2,3-d]pyrimidine (4), is converted to the 7-chloro compound 5 by treatment with a 1:1 complex of N,N-dimethylformamide--thionyl chloride, and 5 is hydrogenolyzed with palladium on charcoal in the presence of potassium hydroxide to yield 7. BW301U is a potent lipid-soluble inhibitor of mammalian dihydrofolate reductase and has significant activity against the Walker 256 carcinosarcoma in rats.
Synthese und Antitumorwirkung von Iso-Piritrexim, einem lipophilen Folatantagonisten
作者:Reinhard Troschütz、Mario Zink、Thomas Dennstedt
DOI:10.1002/ardp.19953280612
日期:——
Synthesewege von Iso‐Piritrexim (12) beschrieben. A) Die Aminomethylierung des Ketons 2 ergibt die Mannich‐Basen 4‐HCI und 5‐HCI, von denen 4, nach sc‐Abtrennung, mit in situ erzeugtem 3,3‐Diaminoacrylnitril (9) zum 2‐Aminonicotinsäurenitril 11 cyslisiert. Der Ringschluß von 11 mit Guanidin führt zum Iso‐PTX(12). B) Durch Reduktion und Oxidation des β‐Ketoesters 15 gelangt man zu einem β‐Keto‐aldehyd
Potent psoriasis activity in combination with low inhibition of histamine N-methyltransferase has been found in a class of 2,4-diamino-6-(2,5-dialkoxybenzyl)-5-methylpyrido[2,3-d]pyrimidines.
A novel class of 2,4-diamino-6-(2,5-dialkoxybenzyl)-5-methyl[2,3-d]-pyrimidines is described. These compounds are antibacterial agents, active against certain Streptococcus species. They are also active antiproliferative agents.
A method of treatment of rheumatoid arthritis in humans in need thereof which comprises administering to said human an effective rheumatoid arthritis treatment amount of compound 2,4-diamino-6-(2,5-dimethoxybenzyl)-5-methylpyrido[2,3-d]pyrimidine or pharmaceutically acceptable acid addition salt thereof.