摘要/Abstract
在室温下，烯基膦氧化合物能够快速地替换掉零价钯配合物Pd（PEt3）4中的两个膦配体，高产率地合成对应的烯基膦氧配位的钯配位化合物3a～3e.烯基膦氧配位的镍和铂配合物3f和3g也能够通过类似的反应方法获得.3e能够与HOAc反应缓慢地释放出烯基膦氧化合物；在相似的条件下再加入2倍量的PEt3，反应能够进行彻底，并缓慢沉淀出一个季磷盐4.与Pd（PEt3）4类似，3d也能够与苯乙炔和亚磷酸二乙酯发生钯氢化反应生成对应的乙烯基-Pd-磷酰基配位化合物，但是反应速度相对比较慢，该结果说明，在钯催化炔烃膦酰化反应中，生成的烯基膦氧化合物将一定程度上抑制催化循环中钯氢化环节的发生.所合成的配位化合和季磷盐4都经过核磁表征，其中两个化合物的分子结构还经过X射线衍射技术确认.
关键词: 烯基膦氧化合物, 第10族过渡金属, 配位化合物
Alkenylphosphoryl compounds could quickly replace two phosphine ligands in Pd(PEt3)4 at room temperature to produce the corresponding palladium complexes 3a~3e in high yields. Similar nickel and platinium complexes 3f and 3g were also synthesized by the reaction. Complex 3e could react with HOAc to release alkenylphosphoryl compounds gradually. By further addition of 2 equiv. of PEt3, the reaction could take place completely, generating a phosphoniun 4 as a precipitation. Being similar to Pd(PEt3)4, 3d could also undergo hydropalladation with the combination of phenylacetylene and (EtO)2P(O)H, forming the expected vinyl-Pd-phosphoryl complex, but with a slower reaction rate. The result indicated that alkenylphosphoryl compounds generated from the palladium-catalyzed hydrophosphorylation of alkynes with H-phosphonates might play a negative role in the hydropalladation step of the catalytic cycle. Complexes 3a~3g and phosphonium 4 were charaterized by NMR analysis. The structures of 3a and 4 were also confirmed by X-ray technology.
Key words: alkenylphosphoryl compounds, group 10 transition metals, coordination compounds
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