Efficient Bulky Phosphines for the Selective Telomerization of 1,3-Butadiene with Methanol
作者:Mathieu J.-L. Tschan、Eduardo J. García-Suárez、Zoraida Freixa、Hélène Launay、Henk Hagen、Jordi Benet-Buchholz、Piet W. N. M. van Leeuwen
DOI:10.1021/ja100521m
日期:2010.5.12
prepared. They were used in the preparation of new monophosphine-palladium(0)-dvds complexes, which were employed as catalysts for the selective telomerization of 1,3-butadiene with methanol to obtain 1-methoxyocta-2,7-diene (1-MOD), the key intermediate in the Dow 1-octene process. Several ligands showed improved selectivity and yield compared to that of the benchmark ligand PPh(3). Especially 2,7-di-tert-butyl-9
制备了一系列含有取代联苯、2-甲基萘基或 2,7-二-叔丁基-9,9-二甲基呫吨部分的庞大膦。它们用于制备新的单膦-钯 (0)-dvds 配合物,该配合物用作 1,3-丁二烯与甲醇选择性调聚得到 1-甲氧基辛基-2,7-二烯 (1-MOD) 的催化剂),陶氏 1-辛烯工艺中的关键中间体。与基准配体 PPh(3) 相比,几种配体显示出更高的选择性和产量。特别是 2,7-二叔丁基-9,9-二甲基黄原酸-4-基-二苯基膦(4,“mono-xantphos”)在产率、选择性和稳定性方面是一种出色的配体。