atom-economical synthetic method for the generation of fused indoles, using a gold-catalyzedcascadecyclization of diynes, has been developed. The reaction gave various fused indoles, such as aryl-annulated[a]carbazoles, dihydrobenzo[g]indoles, and azepino- or oxepinoindole derivatives in good to excellent yields, through an intramolecular cascade 5-endo-dig hydroamination followed by a 6- or 7-endo-dig cycloisomerization
已经开发了一种直接,简洁且原子经济的合成方法,该方法使用金催化的二炔级联环化生成稠合的吲哚。该反应通过分子内级联5-内-挖-加氢胺化,然后进行6-氨基苯甲酸酯化,得到了各种稠合的吲哚,例如芳基环化的[ α ]咔唑,二氢苯并[ g ]吲哚和氮杂环庚烷-或氧代庚并吲哚衍生物,收率良好。或7-内挖式环异构化,而不会产生理论副产物。所得的三支吲哚对T表现出有效的抗真菌活性。癣菌和Ť。风疹,说明了所描述的级联反应在药物发现中的实际应用。
Synthesis of new donor–acceptor–donor materials via Au-catalyzed double cascade cyclization
作者:Giovanni Ferrara、Tienan Jin、Kazuaki Oniwa、Jian Zhao、Abdullah M. Asiri、Yoshinori Yamamoto
DOI:10.1016/j.tetlet.2011.11.132
日期:2012.2
A new class of symmetric pi-conjugated donor-acceptor-donor (D-A-D) materials, with aryl- or heteroaryl[a]annulated carbazole (AHA[a]C) moieties as the donors and with 2,1,3-benzothiadiazole (BT) as an acceptor, has been synthesized via NaAuCl4-catalyzed double cascade cyclization of arenyl tetraynes in ethanol in good to high yields. Photophysical and electrochemical properties of the new D-A-D materials were investigated. (C) 2011 Elsevier Ltd. All rights reserved.