六氯环己-2,5-二烯-1-酮(Hexachlorocyclohexa-2,5-dien-1-one ),一种高效的氯化试剂,可以用于各种氯化反应,具有空间选择性。
与此类似的化合物还有2,3,5,6-四溴-4-甲基-4-硝基-环己-2,5-二烯酮是一种基本上没有氧化性的温和的硝化试剂,可用于带有游离氨基的芳香化合物的硝化。
【Lemaire. M, Tetrahedron, 1987, 43 (5), 835】
反应实例
1-羟基氯萘(4,5)。3(720 mg,5 mmol)在搅拌DMF(10 mL)中于20℃与2(301 mg,5 mmol)处理。48h后,浓缩混合物并进行色谱分析(Al2O3,庚烷:EA 7:3)。硅胶柱层析纯化(庚烷:EA)得到0.8g的4+5(99%),o-:p-30:70。
【Guy A, Lemaire M, Guette JP, Tetrahedron, 1982, 38, 2354】
2,3,5,6-tetrabromo-4-methyl-4-nitro-2,5-cyclohexadien-1-one(2.34 g,5 mmol)was added to the solution of 2-bromo-4-fluoro-phnylamine(0.95 g,5mmol)in dry thf(40毫升).The mixture was stirred for 2 h at room temperature.The solvent was removed under reduced pressure and the residue was purifed by column chromatography to give the desired product(0.82 G,70%)。
【Lemaire. M, Tetrahedron, 1987, 43 (5), 835】
相关文献
1 Guy A, Lemaire M, Guette JP Tetrahedron 1982 38 2346
2 Guy A, Lemaire M, Guette JP Tetrahedron 1982 38 2354
3 Messmer A Tetrahedron 1986 42 5415
4 Guy A, Lemaire M, Guette JP Jansen Chim Acta 1987 5 3
5 Guy A, Lemaire M, Guette JP Tetrahedron 1987 43 835
6 Khatinzadeh G Acta Chim Slov 2007 54 284
7 Ready JM J Am Chem Soc 2011 133 9956
编译自:Organic Syntheses Based On Name Reactions, 3RdEd, A. Hassner, Page 196.