Gold-catalyzed annulations of <i>N</i>-aryl ynamides with benzisoxazoles to construct 6<i>H</i>-indolo[2,3-<i>b</i>]quinoline cores
作者:Meng-Han Tsai、Cheng-Yu Wang、Antony Sekar Kulandai Raj、Rai-Shung Liu
DOI:10.1039/c8cc04264k
日期:——
This work reports new annulations of N-aryl ynamides with benzisoxazoles to form 6H-indolo[2,3-b]quinoline derivatives.
这项工作报道了N-芳基炔酰胺与苯并异噁唑发生新的环合反应,形成6H-吲哚[2,3-b]喹啉衍生物。
Efficient two-step synthesis of structurally diverse indolo[2,3-<i>b</i>]quinoline derivatives
作者:Sandip Kundal、Baitan Chakraborty、Kartick Paul、Umasish Jana
DOI:10.1039/c8ob03033b
日期:——
A general and efficient synthesis of diverse tetracyclic indolo[2,3-b]quinoline derivatives was achieved through palladium-catalyzed domino carboannulation/cross-coupling and DDQ-mediated double cross-dehydrogenative C–N bond formation. This approach provides a straightforward, atom-economical and concise route to easily access a diverse range of tetracyclic indolo[2,3-b]quinolines and their analogues
通过钯催化的多米诺碳环化/交叉偶联和DDQ介导的双交叉脱氢C-N键的形成,可以实现多种四环吲哚并[2,3- b ]喹啉衍生物的一般有效合成。该方法提供了一种简单,原子经济且简洁的途径,可以轻松获得具有优良收率且对官能团具有良好耐受性的各种四环吲哚并[2,3- b ]喹啉及其类似物。
Synthesis of Indolo- and Benzothieno[2,3-<i>b</i>]quinolines by a Cascade Cyclization of <i>o</i>-Alkynylisocyanobenzene Derivatives
A new synthetic approach for the synthesis of indolo[2,3-b]quinolines and benzothieno[2,3-b]quinolines has been developed by employing the freshly prepared o-alkynylisocyanobenzenes derived from o-alkynylformamide derivatives as substrates. The synthetic transformations involved chloride-ion-triggered 6-endo cyclization of o-alkynylisocyanobenzenes to generate 2-chloroquinolines in situ, which further
Iminophosphorane-Mediated Synthesis of the Alkaloid Cryptotackieine
作者:P. Molina、P. M. Fresneda、S. Delgado
DOI:10.1055/s-1999-3386
日期:1999.2
A new synthesis of the alkaloid cryptotackieine based on the stepwise formation of the pyridine and indole ring is described. The key step, formation of the appropriate 3-arylquinoline, involves a Staudinger/aza-Wittig/electrocyclic ring-closure process.