Synthesis of Nitro-Substituted Polyfunctional Biphenyls by Negishi Cross-Coupling ofo-Nitroarylzinc Reagents
作者:Ioannis Sapountzis、Henry Dube、Paul Knochel
DOI:10.1002/adsc.200303235
日期:2004.6
iodine-magnesium exchange reaction allows the preparation of polyfunctional arylmagnesium species bearing a nitro group in the ortho-position. After transmetalation to the corresponding arylzinc compound, these organometallics undergo a palladium-catalyzed Negishi cross-coupling with various aryl iodides to provide polyfunctional biphenyls bearing nitro groups in moderate to good yields.
碘-镁交换反应允许制备在邻位带有硝基的多官能芳基镁物质。在金属转移成相应的芳基锌化合物后,这些有机金属与各种芳基碘化物进行钯催化的Negishi交叉偶联,以中等至良好的产率提供带有硝基的多官能联苯。