Telomerization of 1,3-butadiene with various alcohols by Pd/TOMPP catalysts: new opportunities for catalytic biomass valorization
作者:Regina Palkovits、Andrei N. Parvulescu、Peter J. C. Hausoul、Cornelis A. Kruithof、Robertus J. M. Klein Gebbink、Bert M. Weckhuysen
DOI:10.1039/b904274a
日期:——
The telomerization of 1,3-butadiene with various alcohols has been investigated using a catalyst based on a Pd(acac)2 precursor and a phosphine ligand, TOMPP (TOMPP = tris-(o-methoxyphenyl)phosphine). We were able to demonstrate the capability of the catalyst to telomerize 1,3-butadiene with various multifunctional nucleophiles having primary and secondary alcohol functions. High yields of telomer products (>98%) were obtained in very short reaction times (<2 h). The telomerization activity and selectivity of the Pd/TOMPP complex was strongly influenced by the type of alcohol used as substrate. When diols were used, telomerization of 1,3-butadiene with 1,2-propanediol and 1,2-butanediol afforded the highest yield of mono-telomer (over 70%) and for 1,2-butanediol a turnover frequency (TOF) of 300 000 h−1 was reached, combined with a turnover number (TON) of 7800.
使用基于Pd(acac)2前体和磷配体TOMPP(TOMPP = 三(邻甲氧基苯基)膦)的催化剂,研究了1,3-丁二烯与各种醇的调聚反应。我们证明了该催化剂具有将1,3-丁二烯与具有伯醇和仲醇功能的多功能亲核试剂进行调聚的能力。在非常短的反应时间内(<2小时),获得了高产率的调聚产物(>98%)。Pd/TOMPP络合物的调聚活性和选择性受到所用醇类型的强烈影响。当使用二醇时,1,3-丁二烯与1,2-丙二醇和1,2-丁二醇的调聚反应获得了最高的一调聚物产率(超过70%),而对于1,2-丁二醇,达到了300,000 h−1的转化频率(TOF)和7800的转化数(TON)。