Reaktionen des 2,4,6-tri-tert.-butylphenyl[bis(trimethylsilyl)methylen]phosphans
作者:Rolf Appel、Carl Casser
DOI:10.1016/s0040-4039(01)90194-7
日期:1984.1
The reaction of phosphaalkene 1 with ozone, sulfur and selenium yields the phosphoranes 2, 3 and 4. The methylene halogene substituted phosphaalkene 5 is formed with bromine. The bipyramidal iron carbonyl complexes 8 and 9 are obtained by reaction of 1 and 7 with Fe2 (CO)9.
Synthesis of 2-(2-Pyridyl)phosphaalkenes [Mes*PC(R)Py] (R = H, SiMe<sub>3</sub>) and Their Complexes η<sup>1</sup>,η<sup>1</sup>-[Mes*PC(R)Py]XPdCl (X = Cl, Me, Ac)
作者:Marcel van der Sluis、Vincent Beverwijk、Arjan Termaten、Elena Gavrilova、Friedrich Bickelhaupt、Huub Kooijman、Nora Veldman、Anthony L. Spek
DOI:10.1021/om960925g
日期:1997.3.1
Bidentate ligands of the type Mes*PC(R)Py ((E)-2, R = H; (Z)-9, R = SiMe3; Mes* = supermesityl = 2,4,6-tri-tert-butylphenyl; Py = 2-pyridyl) were synthesized. Ligand (E)-2 was synthesized by reacting Mes*P(Li)SiMe2(t-Bu) (4) with 2-pyridinecarboxaldehyde. Ligand (Z)-9 was synthesized via a PdCl2(dppb)-catalyzed coupling reaction between 2-bromopyridine and Mes*PC(SiMe3)M ((E)-7, M = ZnCl; (Z)-8, M
Formation of 6,8-di-tert-butyl-3,4-dihydro-4,4-dimethyl-1-phosphanaphthalene by the reaction of 2,2-dibromo-1-(2,4,6-tri-tert-butylphenyl)-1-phosphaethene with butyllithium
作者:Shigekazu Ito、Kozo Toyota、Masaaki Yoshifuji
DOI:10.1039/a703554c
日期:——
Sterically crowded 1-bromo-2-(2,4,6-tri-tert-butylphenyl)-
2-phosphaethenyllithium gave
6,8-di-tert-butyl-3,4-dihydro-4,4-dimethyl-1-phosphanaphthalene
by intramolecular insertion of an intermediary phosphinidene carbene
species into one of the C–H bonds of the two o-tert-butyl
groups.
C-Halophosphaalkenes: Probing the range of stability and reactivity towards bromine
作者:S.J. Goede、M.A. Dam、F. Bickelhaupt
DOI:10.1002/recl.19941130503
日期:——
The importance of steric protection for the stability of phosphaalkenes RP=CI2 (6) was investigated by varying the size of group R. The phosphaalkene IsP=CI2 (6b) (Is = 2,4,6-triisopropylphenyl) could be prepared in 15% isolated yield by reaction of IsPCl2 and HCI3 with two equivalents of lithium diisopropylamide, in analogy to the synthesis of the stable, sterically more protected, Mes*P = CI2 (6a)
通过改变基团R的大小,研究了空间保护对磷烯烃RP = CI 2(6)稳定性的重要性。可以制备磷烯烃IsP = CI 2(6b)(Is = 2,4,6-三异丙基苯基)通过IsPCl 2和HCl 3与两当量的二异丙基氨基锂反应,可得到15%的分离收率,类似于稳定的,在空间上更受保护的Mes * P = CI 2(6a)(Mes * = 2,4, 6-三叔丁基苯基)。如果对磷的空间保护作用进一步降低(R = Es = 2,4,6-三乙基苯基,R = Mes = 2,4,6-三甲基苯基),则取代产物RP(Cl)N(Pr i)除了热不稳定的磷烯烃EsP = CI 2(6c)和MesP = CI 2(6d)以外,还形成了2种(R = Es(9c)或Mes(9d))作为主要产物。的结构图9c-d分别由从RPCL独立合成证实2和二异丙基胺的两个当量。
Synthese und reaktiomen der 2,4,6-tri-tert-butylphenyldihalogenpiethylen phosphane