65844-89-5Relevant academic research and scientific papers
Influence of structural features of tri-functionalized aryl phosphates on the outcome of the SRN1 process with stannyl anions: A DFT study
Dorn, Viviana B.,Silbestri, Gustavo F.,Lockhart, María T.,Chopa, Alicia B.,Pierini, Adriana B.
, p. 1150 - 1156 (2013/06/27)
Under irradiation, 1,3-bis(diethoxyphosphoryloxy)-4-chlorobenzene (2), 1,4-bis(diethoxyphosphoryloxy)-3-chlorobenzene (3) and 1,3- bis(diethoxyphosphoryloxy)-5-chlorobenzene (4) react with trimethyltinsodium (1) in liquid ammonia giving entirely different distribution of stannylated products. These differences are explained through theoretical DFT studies. Experimental evidence for the involvement of an SRN1 mechanism was obtained.
Synthesis of 1,3,5-tri- and 1,2,4,5-tetrasubstituted tin and mercury derivatives of benzene. Crystal structure of 1,3,5-tris(chloromercurio)benzene
Rot, Nicolette,De Kanter, Frans J.J.,Bickelhaupt, Friedrich,Smeets, Wilberth J.J.,Spek, Anthony L.
, p. 369 - 379 (2007/10/03)
The reaction of 1,3,5-tribromo- or 1,2,4,5-tetrabromobenzene with trimethylstannyl sodium in tetraglyme gave the corresponding polystannylated benzene derivatives 2 and 4, respectively, in high yield. They were converted with mercuric chloride to the corresponding tris- and tetrakis(chloromercurio)benzenes 5 and 6, respectively. The structure of 5 was confirmed by X-ray crystallography. Some spectral properties of the new compounds are discussed. The (partial) conversion of 2 to 1,3,5-trilithiobenzene (8) was also investigated.
Novel organoborane Lewis acids via selective boron-tin exchange processes - Steric constraints to electrophilic initiation by the boron halide
Eisch, John J.,Kotowicz, Boguslaw W.
, p. 761 - 769 (2007/10/03)
With the purpose of preparing novel mono- and bidentate organoboron Lewis acids, the scope and limitations of synthesizing the requisite organoboranes by the boron-tin exchange between a boron halide and the appropriate organostannane have been examined in detail. The following organotin derivatives have been obtained either from the corresponding RMgBr or RLi reagent and MenSnCl4-n or from a Barbier procedure using the organic halide, Me3SnCl and magnesium metal: 1,2-bis(trimethylstannyl)ethyne, o-, m-, and p-bis(trimethylstannyl)benzenes, α,o-bis(trimethylstannyl)toluene, α,α-bis(trimethylstannyl)-o-xylene, and 2,2-dimethyl-2-stannaindane. The individual interaction of the 1,2-bis(trimethylstannyl)ethyne and the isomeric bis(trimethylstannyl)benzenes with Et2BBr produced the corresponding bis(diethylboryl)-derivatives. By contrast, with Et2BCl the α,o-bis(trimethylstannyl)toluene gave only o-diethylboryl-α-trimethylstannyltoluene and with BCl3 the α,α′-bis(trimethylstannyl)-o-xylene formed only α,α′-bis-(chlorodimethylstannyl)-o-xylene. Furthermore, in the attempted double boron-tin exchange between o-bis(trimethylstannyl)benzene and BCl3, an unprecedented rearrangement of the 1-(dichloroboryl)-2-(trimethylstannyl)benzene intermediate into its 1-[chloro(methyl)boryl]-2-(chlorodimethylstannyl) isomer was observed. Likewise, o-bis(trimethylstannyl)benzene with PhBCl2 produced by a similar rearrangement 1-[methyl(phenyl)boryl]-2-(chloro-dimethylstannyl)benzene. The thermolysis of such boranes led variously to definite dimers or ill-defined oligomers. Preliminary studies of the properties of these organoboranes have identified the heightened Lewis acidity of 1,2-bis(diethylboryl)ethyne and the π-electron delocalization involving the 2pΖ-boron orbitals in the 9,10-dihydro-9,10-diboraanthracene system. Finally, an electronic mechanism for the boron-tin exchange has been developed to account for the selectivity of the boron halide's attack at unsaturated carbon-tin bonds.
Formation of 1,3,5-trilithiobenzene and its conversion to the corresponding magnesium, mercury, and tin derivatives
Rot, Nicolette,Bickelhaupt, Friedrich
, p. 5027 - 5031 (2008/10/08)
Whereas the halogen-metal exchange approach from 1,3,5-tribromobenzene (3) to 1,3,5-trilithiobenzene (1) was unsuccessful, 1 was synthesized in high yield (about 80%) by reaction of 3 with LiDBB (lithium 4,4′-di-tert-butylbiphenyl). Compound 1 was used as
