新的不对称取代硼am的合成[ N '-(2,6-二异丙基苯基)-N-(五氟苯基)乙二酰胺]双(五氟苯基)硼酸酯(2a)和[ N '-(2,6-二异丙基苯基)-N - (4-氰基苯基)乙脒]双(五氟苯基)硼酸盐(2B)由一个当量的HB(C中的反应来实现6 ˚F 5)2和相应的脒1A和1B。这些带有吸电子基团的加合物显示出热诱导的H 2消除,形成了四元环状重氮硼酸酯衍生物3a和3b。这些新物种通过光谱学方法进行了表征。X射线衍射研究已经在2a,2b和3a上进行。为了防止在腈基发生不希望的反应,将一当量的B(C 6 F 5)3加入到2b中,得到2b -B(C 6 F 5)3腈加合物4。对化合物4进行热诱导的脱氢,得到四元环状重氮硼酸酯衍生物5。将CO插入2a和2a的环系统中2b形成五元二氮杂硼烷衍生物6a和6b。苯乙炔与不对称取代的硼am 2a,2b和4化学计量反应,通过两次H转移得到苯乙烯。
新的不对称取代硼am的合成[ N '-(2,6-二异丙基苯基)-N-(五氟苯基)乙二酰胺]双(五氟苯基)硼酸酯(2a)和[ N '-(2,6-二异丙基苯基)-N - (4-氰基苯基)乙脒]双(五氟苯基)硼酸盐(2B)由一个当量的HB(C中的反应来实现6 ˚F 5)2和相应的脒1A和1B。这些带有吸电子基团的加合物显示出热诱导的H 2消除,形成了四元环状重氮硼酸酯衍生物3a和3b。这些新物种通过光谱学方法进行了表征。X射线衍射研究已经在2a,2b和3a上进行。为了防止在腈基发生不希望的反应,将一当量的B(C 6 F 5)3加入到2b中,得到2b -B(C 6 F 5)3腈加合物4。对化合物4进行热诱导的脱氢,得到四元环状重氮硼酸酯衍生物5。将CO插入2a和2a的环系统中2b形成五元二氮杂硼烷衍生物6a和6b。苯乙炔与不对称取代的硼am 2a,2b和4化学计量反应,通过两次H转移得到苯乙烯。
Grafting of the zirconium complexes [Zr(η5-C5H5){NC-amidine}Cl2] and [Zr(η5-C5H5)(NC-NacNac)Cl2] and the study of their behavior in ethylene polymerization
作者:Alan R. Cabrera、Elena Villaseñor、Francisca Werlinger、Rene S. Rojas、Mauricio Valderrama、Antonio Antiñolo、Fernando Carrillo-Hermosilla、Rafael Férnadez-Galan
DOI:10.1016/j.molcata.2014.04.017
日期:2014.9
The synthesis of the new zirconium complex [Zr(eta(5)-C5H5)NC-amidine}Cl-2] (1) has been achieved by reaction of the amidine (E)-N-(4-cyanophenyI)-N'-(2,6-diisopropylphenyl)acetimidamide with [Zr(eta(5)-C5H3)Cl-3] and the new complex has been characterized by spectroscopic methods. The reaction of one equivalent of B(C6F5)(3) with compound 1 produces the adduct [Zr(eta(5)-C5H5)(C6F3)B-NC-amidine}]Cl-2 (2). Complexes 1 and 2 have been tested as homogeneous catalysts in olefin polymerization using MAO as cocatalyst.The grafting of 1 and the previously reported complex [Zr(eta(5)-C5H5)(NC-NacNac)Cl-2] (3) on to several inorganic solid supports, namely dehydroxylated silica (SiO2(TEMP)) (S-1), dehydroxylated silica modified with O(SiMe3)(2) (S-2) or MAO (S-3), and MgCl2 (S-4) has been carried out by addition of a freshly prepared solution of 1 or 3 to the corresponding inorganic solid. FT-IR studies of the new materials showed that the links between complexes 1 or 3 and S-1 and S-2 occur through the zirconium center, whereas with S-3 and S-4 the links involve the CN functional group of the ligand. These new materials have been studied as catalysts in olefin polymerization reactions in the presence of MAO. A UV-vis study was carried out in order to identify the minimum amount of MAO necessary to produce the active species. A preliminary study into the activity in olefin polymerizations was also carried out. (C) 2014 Elsevier B.V. All rights reserved.
Synthesis of new asymmetric substituted boron amidines – reactions with CO and transfer hydrogenations of phenylacetylene
作者:Alan R. Cabrera、Rene S. Rojas、Mauricio Valderrama、Pascal Plüss、Heinz Berke、Constantin G. Daniliuc、Gerald Kehr、Gerhard Erker
DOI:10.1039/c5dt01966d
日期:——
induced dehydrogenation to give the four-membered cyclic diazaborate derivative 5. CO was inserted into the ring systems of 2a and 2b forming the five-membered diazaborolone derivatives 6a and 6b. Phenylacetylene reacted stoichiometrically with the asymmetric substituted boron amidines 2a, 2b and 4 to give styrene by double H transfer.
新的不对称取代硼am的合成[ N '-(2,6-二异丙基苯基)-N-(五氟苯基)乙二酰胺]双(五氟苯基)硼酸酯(2a)和[ N '-(2,6-二异丙基苯基)-N - (4-氰基苯基)乙脒]双(五氟苯基)硼酸盐(2B)由一个当量的HB(C中的反应来实现6 ˚F 5)2和相应的脒1A和1B。这些带有吸电子基团的加合物显示出热诱导的H 2消除,形成了四元环状重氮硼酸酯衍生物3a和3b。这些新物种通过光谱学方法进行了表征。X射线衍射研究已经在2a,2b和3a上进行。为了防止在腈基发生不希望的反应,将一当量的B(C 6 F 5)3加入到2b中,得到2b -B(C 6 F 5)3腈加合物4。对化合物4进行热诱导的脱氢,得到四元环状重氮硼酸酯衍生物5。将CO插入2a和2a的环系统中2b形成五元二氮杂硼烷衍生物6a和6b。苯乙炔与不对称取代的硼am 2a,2b和4化学计量反应,通过两次H转移得到苯乙烯。