Palladium-catalyzed synthesis of novel tetra- and penta-cyclic biologically active benzopyran- and pyridopyran-containing heterocyclic systems
作者:Tatjana Beresneva、Anatoly Mishnev、Elina Jaschenko、Irina Shestakova、Anita Gulbe、Edgars Abele
DOI:10.3998/ark.5550190.0013.916
日期:——
Syntheses of novel tetraand penta-cyclic benzopyran and pyridopyran derivatives, via direct intramolecular arylation of 2-iodophenoxymethylhetarenes and 3-(2-bromo-pyridin-3yloxymethyl)-benzo[4,5]imidazo[2,1-b]thiazole in the catalytic system Pd(OAc)2 / Xantphos / Cs2CO3 / Ag2CO3 in toluene, and a one-pot bicatalytic method for 12H[1]benzopyrano[3′,4′:4,5]thiazolo[3,2-a]benzimidazole directly from
新型四环和五环苯并吡喃和吡啶并吡喃衍生物的合成,通过 2-碘苯氧基甲基异戊二烯和 3-(2-溴-吡啶-3酰氧基甲基)-苯并[4,5]咪唑并[2,1-b]噻唑的直接分子内芳基化催化体系Pd(OAc)2 / Xantphos / Cs2CO3 / Ag2CO3在甲苯中,以及12H[1]苯并吡喃[3',4':4,5]噻唑并[3,2-a]苯并咪唑的一锅双催化法描述了来自 3-氯甲基苯并 [4,5] 咪唑并 [2,1-b] 噻唑和 2-碘苯酚。后一种化合物对小鼠肝癌癌细胞系表现出高细胞毒性(MG-22A,6 μg/mL),对小鼠瑞士白化胚胎成纤维细胞 3T3 表现出低毒性(LD50,1058 mg/kg)。