The reaction of 2-(arylethynyl)biphenyls with ICl at -78 degrees C affords substituted polycyclic aromatic iodides in good to excellent yields. The aryl substituents can be either electron-donating or electron-withdrawing groups such as OMe, Me, CHO, CO(2)Et or NO(2) groups. This chemistry has been successfully extended to systems containing a variety of polycyclic and heterocyclic rings. [reaction:
2-(芳基
乙炔基)
联苯与ICl在-78℃下反应以良好或优异的产率提供了取代的多环芳族
碘化物。芳基取代基可以是供电子基团或吸电子基团,例如OMe,Me,CHO,CO(2)Et或NO(2)。该
化学方法已成功地扩展到包含各种多环和杂环的系统。[反应:看文字]