作者:Chen, Xia、Liu, Yining、Zhang, Sheng、Li, Yang、Zhou, Xiao-Yu、Yu, Xiaoqiang、Feng, Xiujuan、Yamamoto, Yoshinori、Bao, Ming
DOI:10.1021/acs.orglett.4c02161
日期:——
A new radical difluoromethylation was developed by using inexpensive and readily available difluoroacetic anhydride and N-phenyl-4-methylbenzenesulfonamide for the first time. The reaction of arylboronic acids with the new difluoromethylation reagent, N-phenyl-N-tosyldifluoroacetamide, proceeded smoothly in the presence of palladium catalyst to provide difluoromethylarenes in satisfactory to excellent
首次利用廉价易得的二氟乙酸酐和N-苯基-4-甲基苯磺酰胺开发了一种新的自由基二氟甲基化反应。芳基硼酸与新型二氟甲基化试剂N-苯基-N-甲苯磺酰基二氟乙酰胺的反应在钯催化剂存在下顺利进行,以令人满意的优异收率提供二氟甲基芳烃。连接至芳环的取代基的电子性质(给电子或吸电子)对芳基硼酸的反应性没有显着影响。各种基团,包括合成上有用的官能团Cl、CN和NO 2 ,在当前反应条件下具有良好的耐受性。