Efficient synthesis and applications of 2-substituted azulene derivatives: towards highly functionalized carbo- and heterocyclic molecules
作者:Chi-Phi Wu、Badugu Devendar、Hui-Chi Su、Ya-Hui Chang、Chien-Kuo Ku
DOI:10.1016/j.tetlet.2012.07.040
日期:2012.9
An efficient synthesis of 2-substituted azulene derivatives (3–6) was accomplished from ethyl 2-oxo-2H-cyclohepta[b]furan-3-carboxylate 1 and its derivative 2, which in turn were prepared from readily available tropolone. Compounds 1 and 2 were utilized to construct densely functionalized benz[a]azulene and azulene-furan frameworks (16–25, 29–34, 37, 38).
2-取代的薁衍生物(的有效合成3 - 6)从2-氧代完成2H -环庚[ b ]呋喃-3-羧酸乙酯1和它的衍生物2,而后者又是从容易得到的酚酮制备。化合物1和2被用来构造密集官能苯并[一个]薁和薁呋喃框架(16 - 25,29 - 34,37,38)。