Novel tandem reaction of benzyne with cyclic ethers and active methines: synthesis of ω-trichloroalkyl phenyl ethers
作者:Kentaro Okuma、Yuta Fukuzaki、Akiko Nojima、Kosei Shioji、Yoshinobu Yokomori
DOI:10.1016/j.tetlet.2008.03.058
日期:2008.5
The reaction of benzenediazonium carboxylate with chloroform in refluxing tetrahydrofuran afforded 5,5,5-trichloropentyl phenyl ether in 61% yield along with benzoic acid (7%). When dichloroacetonitrile was used as a reactant, 5,5-dichloro-5-cyanopentyl phenyl ether was obtained in 65% yield. Reactive benzyne derived from diazonium carboxylate initially reacted with THF to give a dipole intermediate
在回流的四氢呋喃中使羧酸苯重氮鎓与氯仿反应,以61%的产率提供5,5,5-三氯戊基苯基醚以及苯甲酸(7%)。当使用二氯乙腈作为反应物时,以65%的收率获得5,5-二氯-5-氰基戊基苯基醚。衍生自羧酸重氮鎓的反应性苯炔最初与THF反应生成偶极中间体,然后进一步与氯仿或二氯乙腈反应生成开环产物。