Copper-Mediated Reactions of Nitriles with Nitromethanes: Aza-Henry Reactions and Nitrile Hydrations
作者:Jun Kuwabara、Yoshiharu Sawada、Mitsuhiro Yoshimatsu
DOI:10.1021/acs.orglett.8b00058
日期:2018.2.16
In this study, the first aza-Henry reaction of nitriles with nitromethane in a CuI/Cs2CO3/DBU system is described. The process was conveniently and directly used for the synthesis of β-aminonitroalkenes 2a–x and tolerated aryl-, alkyl-, hetaryl-, alkenyl-, and alkynylnitriles. The resulting aminonitroalkenes 2 could be successfully transformed to the corresponding 2-nitroacetophenones, 2-amino-1-halonitroalkenes
在这项研究中,描述了在CuI / Cs 2 CO 3 / DBU系统中腈与硝基甲烷的第一个氮杂-亨利反应。该方法可方便,直接地用于合成β-氨基硝基烯烃2a – x和可耐受的芳基,烷基,杂芳基,烯基和炔腈。所得的氨基硝基烯烃2可以成功地转化为相应的2-硝基苯乙酮,2-氨基-1-卤代硝基烯烃,2-烷基氨基硝基烯烃或3-硝基吡啶。在存在H 2 O的情况下,氮杂-亨利反应将反应路径转变为腈水合,仅生成酰胺3a - s。