Cationic cyclopalladated complexes: new catalyst precursors for the telomerization of butadiene with alcohols
Cationic cyclopalladated complexes: new catalyst precursors for the telomerization of butadiene with alcohols
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DOI：
10.1016/1381-1169(96)00024-6
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发表时间：
1996-06
影响因子：
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通讯作者：
M. Camargo;P. Dani;J. Dupont;R. F. Souza;M. Pfeffer;I. Tkatchenko
中科院分区：
文献类型：
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作者：
M. Camargo;P. Dani;J. Dupont;R. F. Souza;M. Pfeffer;I. Tkatchenko
合成了N，N-二甲基苄胺4、N-亚苄基-（S）-（-）-α-甲基苄胺5和8-甲基喹啉6的阳离子环钯配合物，并研究了它们作为丁二烯与甲醇调聚催化剂前驱体的性能。三种配合物的丁二烯转化率为60-70%，并形成丁二烯二聚体和含有2、4和6个丁二烯单元的调聚物的混合物。产物的选择性受到环钯化络合物的性质的强烈影响。因此，与配合物6的C16和C24调聚物形成优先（超过85%）。另一方面，对于络合物4，丁二烯二聚体的量大于40%。配合物6对其它脂肪醇的调聚也有活性，但在这些情况下优先产生1-和3-烷氧基辛烯调聚物。
The cationic cyclopalladated complexes derived from N,N-dimethylbenzylamine 4, N-benzylidene-(S)-(−)-α-methylbenzylamine 5 and 8-methyl quinoline 6 have been prepared and their properties as catalyst precursors for the telomerization of butadiene with methanol were investigated. The butadiene conversion was 60–70% for the three complexes and a mixture of butadiene dimers and telomers containing 2, 4 and 6 butadiene units were formed. The product selectivity is strongly influenced by the nature of the cyclopalladated complex. Thus, with complex 6 the C16 and C24 telomers were formed preferentially (more than 85%). On the other hand, with complex 4 the amount of butadiene dimers is greater than 40%. Complex 6 is also active for the telomerization of other aliphatic alcohols, but in these cases the 1- and 3-alkoxy octadiene telomers were produced preferentially.