Synthesis and biological activities of 5-deaza analogs of aminopterin and folic acid
作者:Tsann Long Su、Jai Tung Huang、Joseph H. Burchenal、Kyoichi A. Watanabe、Jack J. Fox
DOI:10.1021/jm00155a021
日期:1986.5
N-[p-[[(2,4-Diaminopyrido[2,3-d]pyrimidin-6-yl)methyl] amino]benzoyl]-L-glutamic acid (1a, 5-deazaaminopterin) and the 5-methyl analogue (1b) were synthesized in 14 steps from 5-cyanouracil (4a) and 5-cyano-6-methyluracil (4b), respectively, by exploitation of the novel pyrimidine to pyrido[2,3-d]pyrimidine ring transformation reaction. The 5-cyanouracils 4 were treated with chloromethyl methyl ether
N- [p-[[((2,4-二氨基吡啶并[2,3-d]嘧啶-6-基)甲基]氨基]苯甲酰基] -L-谷氨酸(1a,5-deazaaminopterin)和5-甲基类似物(1b)分别由5-氰尿嘧啶(4a)和5-氰基-6-甲基尿嘧啶(4b)分14步合成,通过利用新型嘧啶进行吡啶并[2,3-d]嘧啶环转化反应。用氯甲基甲基醚将5-氰尿嘧啶4处理成1,3-双(甲氧基甲基)尿嘧啶(5,将其在NaOEt / EtOH中用丙二腈处理,得到吡啶并[2,3-d]嘧啶6。在浓盐酸中6生成高产率的7-氯衍生物8,还原8后,在Ac2O存在下还原7-未取代的产物9,然后将6-(乙酰氨基甲基)吡啶并嘧啶10转化为6 -乙酰氧基甲基衍生物12通过亚硝化。从12除去N-甲氧基甲基后,将6-(乙酰氧基甲基)吡啶并[2,3-d]嘧啶-2,4(1H,3H)-二酮14转化为2,4-二氨基-6-(通过甲硅烷基化-胺化步骤得到羟甲基)吡啶并[2