Reactivity of 2-t-butyl-4,5-didehydropyrimidine and electronic structure of the parent hetaryne
作者:Michel Tielemans、Vincent Areschka、Jaume Colomer、Robert Promel、Wilfried Langenaeker、Paul Geerlings
DOI:10.1016/s0040-4020(01)88355-1
日期:1992.11
was allowed to react with a variety of reagents. Trapping experiments with furan and two tetracyclones gave the expected adducts in low to moderate yields. On treatment with anthracene and 1,3-cyclohexadiene, complex mixtures were obtained from which the adducts could not be isolated. Cycloaddition of phenyl azide to the intermediate yielded 3-phenyl-5-t-butyl-3H-v-triazolo[4,5-d]pyrimidine as the major
使3-氨基-5-叔丁基-3H-v-三唑并[4,5-d]嘧啶的氧化反应生成的2-叔丁基-4,5-二氢嘧啶与各种试剂反应。用呋喃和两个四环酮进行的捕集实验以低至中等的收率得到了预期的加合物。用蒽和1,3-环己二烯处理时,获得了复杂的混合物,从中不能分离出加合物。将苯叠氮基环加成到中间体中,生成3-苯基-5-叔丁基-3H-v-三唑并[4,5-d]嘧啶作为主要产物,以及出乎意料的2-叔丁基-9H-嘧啶[4]。 ,5-b]吲哚的量较少。通过与描述了合成方法的真实样品进行比较,确定了这两种化合物的结构。用2,3,5-三-O-苯甲酰基-β-D-呋喃呋喃糖基叠氮化物也发生环加成,从而以低收率得到8-氮杂核苷。前体在乙醇中的氧化仅得到4-乙氧基-2-叔丁基嘧啶。在碘的存在下,在二氯甲烷或苯中氧化,可得到由于侵蚀溶剂而生成的产物,分别为4-氯-5-碘-2-叔丁基嘧啶和5-碘-4-苯基-2-叔丁基嘧啶。另外,在