Site-selective sequential coupling reactions controlled by “Electrochemical Reaction Site Switching”: a straightforward approach to 1,4-bis(diaryl)buta-1,3-diynes
作者:Koichi Mitsudo、Natsuyo Kamimoto、Hiroki Murakami、Hiroki Mandai、Atsushi Wakamiya、Yasujiro Murata、Seiji Suga
DOI:10.1039/c2ob26567b
日期:——
Site-selective sequential coupling reactions directed toward bis(diaryl)butadiynes are described. The reaction site could be controlled completely by the on/off application of electricity. The electro-oxidative homo-coupling of terminal alkynes (electricity ON) and the subsequent SuzukiâMiyaura coupling (electricity OFF) afforded bis(diaryl)butadiynes in high yields. The obtained 1,4-bis(diaryl)butadiynes could be converted to a 2,5-bis(diaryl)thiophene derivative, which exhibited blue fluorescence.
介绍了针对双(二芳基)丁二烯的位点选择性顺序偶联反应。反应位点完全可以通过通/断电来控制。末端炔的电氧化均偶联反应(通电)和随后的铃木-宫浦偶联反应(断电)以高产率获得了双(二芳基)丁二烯。获得的 1,4-双(二芳基)丁二烯可转化为 2,5-双(二芳基)噻吩衍生物,后者可发出蓝色荧光。