A concise synthesis of 4-imino-3,4-dihydroquinazolin-2-ylphosphonates via a palladium-catalyzed reaction of carbodiimide, isocyanide, and phosphite
作者:Guanyinsheng Qiu、Yuan Lu、Jie Wu
DOI:10.1039/c2ob26979a
日期:——
A palladium-catalyzedreaction of 2-iodoarylcarbodiimide, isocyanide, and phosphite leads to 4-imino-3,4-dihydroquinazolin-2-ylphosphonates in moderate to good yields. Three bonds are formed in a one pot procedure and the tandem process includes nucleophilic attack, isocyanide insertion, and C–N coupling.
the assembly of novel polycyclic benzimidazole derivatives has been developed by Cu-catalyzed domino addition/double cyclization reactions. A wide variety of polycyclic benzimidazole derivatives, which might be used as synthetic medicines and functional materials, were successfully assembled from bis-(o-haloaryl)carbodiimides. Unexpected N-methylated benzo[4,5]imidazo[1,2-a]indoles can also be selectively
通过铜催化的多米诺加成/双环化反应,已经开发了一种高效且通用的新型多环苯并咪唑衍生物的组装方法。由双-(邻-卤代芳基)碳二亚胺成功地组装了多种可用作合成药物和功能材料的多环苯并咪唑衍生物。意外的N-甲基化的苯并[4,5]咪唑并[1,2- a ]吲哚也可以被选择性地组装。在这些多米诺骨牌过程中,多键和多环部分很容易在一个锅中形成。
Preparation of quinazolino[3,2-a]quinazolines via a palladium-catalyzed three-component reaction of carbodiimide, isocyanide, and amine
作者:Guanyinsheng Qiu、Yaohua He、Jie Wu
DOI:10.1039/c2cc30928a
日期:——
A palladium-catalyzed three-component reaction of bis-(2-iodoaryl)carbodiimide, isocyanide, and amine gives rise to quinazolino[3,2-a]quinazolines and related compounds in good yields. Multi-bonds are formed in one pot through nucleophilic attack, isocyanide insertion, and C-N coupling during the reaction process.
Generation of benzoimidazo[1,5-a]imidazoles via a copper-catalyzed tandem reaction of carbodiimide and isocyanoacetate
作者:Guanyinsheng Qiu、Jie Wu
DOI:10.1039/c2cc32135a
日期:——
Carbodiimide reacts with isocyanide catalyzed by copper(I) iodide, leading to benzoimidazo[1,5-a]imidazoles in good yields. This reaction is efficient, and proceeds through a formal [3+2] cycloaddition and C–N coupling.
One-Step Synthesis of Quinazolino[3,2-<i>a</i>]quinazolinones via Palladium-Catalyzed Domino Addition/Carboxamidation Reactions
作者:Fanlong Zeng、Howard Alper
DOI:10.1021/ol101428v
日期:2010.8.20
A highly efficient palladium-catalyzed domino process has been developed for the synthesis of quinazolino[3,2-a]quinazolinones by forming five new bonds in a single step. Despite the high density and variety of functional groups on the substrates, the tetracyclic quinazolinones were obtained in good to excellent yields.
已经开发了一种高效的钯催化多米诺骨牌工艺,用于通过一步形成五个新键来合成喹唑啉代[3,2- a ]喹唑啉酮。尽管底物上具有高密度和各种官能团,但仍以良好至优异的产率获得了四环喹唑啉酮。