2-Aryl and 2-Heteroaryl Pyrrolo[2,3-<i>b</i>]quinoxalines via Copper-Catalyzed Reaction of 1-Alkynes with 2-Bromo-3-trifluoroacetamidoquinoxaline
作者:Sandro Cacchi、Giancarlo Fabrizi、Luca M. Parisi、Roberta Bernini
DOI:10.1055/s-2003-45004
日期:——
2-Aryl and 2-heteroaryl pyrrolo[2,3-b]quinoxalines have been prepared in good to high yield through the reaction of 1-alkynes with 2-bromo-3-trifluoroacetamidoquinoxaline in the presence of catalytic amounts of CuI, PPh3, and K2CO3 in dioxane at 110 °C. The reaction appears to tolerate a wide range of functionalized 1-alkynes, including those containing ether, alcohol, amide, aldehyde, ketone, ester, and nitro groups.
在一定量的 CuI、PPh3 和 K2CO3 催化下,在二噁烷中于 110 °C,通过 1-炔与 2-溴-3-三氟乙酰胺基喹喔啉的反应,制备了 2-芳基和 2-杂芳基吡咯并[2,3-b]喹喔啉,收率从好到高。该反应似乎可以耐受多种官能化 1- 烷炔,包括含有醚、醇、酰胺、醛、酮、酯和硝基的烷炔。