5的简便合成ħ -苯并[ b ]咔唑-6-基酮通过铜催化的Friedel-Crafts烷基化的顺序反应,碘促进的环化,亲核取代和芳构化†
摘要:
一种方便的方法,该方法可通过连续的Cu催化的吲哚与2-(2-(炔基)亚苄基)丙二酸酯的碘化物的连续Fried-Crafts烷基化反应来获得5 H-苯并[ b ]咔唑-6-基酮,然后进行碘促进的亲电环化反应通过亲核取代和芳构化得到了发展。以高达98%的产率获得了功能性5 H-苯并[ b ]咔唑-6基酮的产物。
PdCl2-Catalyzed Domino Reactions of 2-Alkynylbenzaldehydes with Indoles: Synthesis of Fluorescent 5H-Benzo[b]carbazol-6-yl Ketones
作者:Ri-Yuan Tang、Jin-Heng Li
DOI:10.1002/chem.201000133
日期:2010.4.26
selective Pd‐catalyzed dominoreaction of 2‐alkynylbenzaldehydes with indoles has been developed for the synthesis of 5H‐benzo[b]carbazol‐6‐yl ketones. The isobenzopyrylium complex is trapped by indole at room temperature to give 3‐(1H‐isochromen‐1‐yl)‐1H‐indoles, which can be transformed into 5H‐benzo[b]carbazol‐6‐yl ketones by raising the temperature (see scheme). These ketones exhibit intense fluorescence
合成方法:已开发出一种新的,选择性的Pd催化的2-炔基苯甲醛与吲哚的多米诺反应,用于合成5 H-苯并[ b ]咔唑-6-基酮。室温下,吲哚会俘获异苯并吡啶鎓配合物,从而生成3‐(1 H‐异色素n ‐1‐基)‐1 H‐吲哚,可通过提纯将其转变为5 H‐苯并[ b ]咔唑-6‐基酮温度(请参阅方案)。这些酮表现出强烈的荧光并与金属离子相互作用以增强荧光强度。
Facile synthesis of 5H-benzo[b]carbazol-6-yl ketones via sequential reaction of Cu-catalyzed Friedel–Crafts alkylation, iodine-promoted cyclization, nucleophilic substitution and aromatization
作者:Jing Wu、Dongping Wang、Haolong Wang、Fan Wu、Xincheng Li、Boshun Wan
DOI:10.1039/c4ob00815d
日期:——
A convenient method to access 5H-benzo[b]carbazol-6-ylketones via a sequential Cu-catalyzed Friedel–Crafts alkylation reaction of indoles with 2-(2-(alkynyl)benzylidene)malonates and iodine-promoted electrophilic cyclization followed by nucleophilic substitution and aromatization was developed. The products of the functional 5H-benzo[b]carbazol-6-ylketones were obtained with up to 98% yield.
一种方便的方法,该方法可通过连续的Cu催化的吲哚与2-(2-(炔基)亚苄基)丙二酸酯的碘化物的连续Fried-Crafts烷基化反应来获得5 H-苯并[ b ]咔唑-6-基酮,然后进行碘促进的亲电环化反应通过亲核取代和芳构化得到了发展。以高达98%的产率获得了功能性5 H-苯并[ b ]咔唑-6基酮的产物。