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。