申请人:INTERNATIONAL FLAVORS & FRAGRANCES INC.
公开号:US20170275235A1
公开(公告)日:2017-09-28
A method for the selective synthesis of a tail-to-head, or a head-to-head, or a tail-to-tail telomer from an unsymmetrical diene by polymerizing the diene in the presence of [Pd(C
3
H
5
)COD]BF
4
and dicyclohexyl-[1-(2,4,6-trimethylphenyl)imidazol-2-yl]phosphane, Pd(OAc)
2
and triphenylphosphine, or [Pd(C
3
H
5
)COD]BF
4
and tris(2,4-di-tert-butylphenyl)phosphite in combination with a polar protic alcohol, an acidic polar protic alcohol, a polar aprotic ether, or a non-polar aprotic hydrocarbon is provided.
提供了一种从非对称二烯通过在[Pd(C3H5)COD]BF4和二环己基-[1-(2,4,6-三甲基苯基)咪唑-2-基]膦烷,Pd(OAc)2和三苯基膦,或[Pd(C3H5)COD]BF4和三(2,4-二叔丁基苯基)磷酸酯的存在下,通过在极性质子醇,酸性极性质子醇,极性无水醚或非极性无水碳氢化合物中聚合二烯的方法,选择性地合成尾-头,头-头或尾-尾缩聚物。