Ruthenium-Catalyzed Cycloisomerization of 2,2′-Diethynyl- biphenyls Involving Cleavage of a Carbon-Carbon Triple Bond
作者:Takanori Matsuda、Kotaro Kato、Tsuyoshi Goya、Shingo Shimada、Masahiro Murakami
DOI:10.1002/chem.201504937
日期:2016.2.5
ruthenium complex catalyzes a new cycloisomerization reaction of 2,2′‐diethynylbiphenyls to form 9‐ethynylphenanthrenes, thereby cleaving the carbon–carbon triple bond of the original ethynyl group. A metal–vinylidene complex is generated from one of the two ethynyl groups, and its carbon–carbon double bond undergoes a [2+2] cycloaddition with the other ethynyl group to form a cyclobutene. The phenanthrene
钌配合物催化新的2,2'-二乙炔基联苯的环异构化反应,形成9-乙炔基菲,从而裂解了原始乙炔基的碳-碳三键。由两个乙炔基之一生成金属-亚乙烯基配合物,其碳-碳双键与另一个乙炔基进行[2 + 2]环加成反应,形成环丁烯。菲骨架是由随后的环丁烯部分的电环开环构成的。