Diversity-Oriented Synthesis of Functionalized Pyrrolo[3,2-<i>d</i>]pyrimidines with Variation of the Pyrimidine Ring Nitrogen Substituents
作者:Félix-Antoine Marcotte、Frederik J. R. Rombouts、William D. Lubell
DOI:10.1021/jo034684f
日期:2003.9.1
by treatment with phenyl, allyl, and ethyl isocyanate gave nine different ureas 9. 4-Ureido-1H-pyrrole-2-carboxylic acid benzyl esters 9 were then converted into the respective pyrrolo[3,2-d]pyrimidines 12 using trichloroacetyl chloride in acetonitrile followed by treatment with Cs(2)CO(3). Crystallization from toluene gave the desired deazapurines in 37-55% overall yield from proline 7.
由4-氧代-N-(PhF)分四个步骤合成了九种2,4-二氧代-2,3,4,5-四氢-1H-吡咯并[3,2-d]嘧啶-6-羧酸苄酯12脯氨酸苄酯7的一般方法,其中分子多样性的元素很容易加到嘧啶氮上。使用苄基,烯丙基和异丙基胺将4-氧代脯氨酸7转化为相应的氨基吡咯8,然后用苯基,烯丙基和异氰酸乙酯处理,得到9种不同的脲9。4-Ureido-1H-吡咯-2-羧酸苄基然后使用三氯乙酰氯的乙腈溶液将酯9转化为相应的吡咯并[3,2-d]嘧啶12,然后用Cs(2)CO(3)处理。从甲苯中结晶可得到所需的脱氮嘌呤类化合物,脯氨酸7的总收率为37-55%。