polyhydride complexes containing tridentate PNP pincer-type ligands is described. These compounds of the general formula [Fe(PNP)(H)2(η2-H2)] exhibit remarkable reactivity toward terminal alkynes. They efficiently promote the catalytic dimerization of aryl acetylenes giving the corresponding conjugated 1,3-enynes in excellent yields with low catalyst loadings. When the reaction is carried out in the presence
描述了含有三齿
PNP 钳型
配体的非经典
铁 (II)
氢化物配合物的合成、表征和催化活性。这些通式[Fe(
PNP)(H)2(η2-H2)]的化合物对末端炔表现出显着的反应性。它们有效地促进芳基
乙炔的催化二聚化,以极低的催化剂负载量以优异的产率得到相应的共轭 1,3-烯炔。当反应在
频哪醇硼烷存在下进行时,得到
乙烯基硼酸酯。这两个反应都在温和的条件下进行,并且具有高度的
化学选择性、区域选择性和立体选择性,Z 选择性高达 99%。