Sulfonate Versus Sulfonate: Nickel and Palladium Multimetallic Cross-Electrophile Coupling of Aryl Triflates with Aryl Tosylates
作者:Kai Kang、Liangbin Huang、Daniel J. Weix
DOI:10.1021/jacs.0c04670
日期:2020.6.17
While phenols are frequent and convenient aryl sources in cross-coupling, typically as sulfonate esters, the direct cross-Ullmann coupling of two different sulfonate esters is unknown. We report here a general solution to this chal-lenge catalyzed by a combination of Ni and Pd with Zn reductant and LiBr as an additive. The reaction has broad scope, as demonstrated in 33 examples (65% ± 11% ave yield)
Design and Synthesis of New Polymeric Materials for Organic Nonvolatile Electrical Bistable Storage Devices: Poly(biphenylmethylene)s
作者:Matthias Beinhoff、Luisa D. Bozano、J. Campbell Scott、Kenneth R. Carter
DOI:10.1021/ma049572k
日期:2005.5.1
The synthesis of new polymers, poly(biphenylmethylene)s, derived from bistriflates of bisphenol-type monomers, by Ni(0)-mediated polymerization has been presented. These polymers are interesting because of the nature of the polymer backbone that contains biphenyl units separated by substituted methylene units. The solubility, mechanical properties, and electrical properties of the polymers can be altered
The synthesis of new polymers, poly(biphenylmethylene)s, derived from bistriflates of bisphenol-type monomers, by Ni(0)-mediated polymerization has been presented. These polymers are interesting because of the nature of the polymer backbone that contains biphenyl units separated by substituted methylene units. The solubility, mechanical properties, and electrical properties of the polymers can be altered
Convenient synthetic route to tetraarylphosphonium polyelectrolytes via palladium-catalyzed P-C coupling of aryl triflates and diphenylphosphine
作者:Wang Wan、Xiaoyan Yang、Rhett C. Smith
DOI:10.1002/pola.28564
日期:2017.6.15
polyelectrolytes (TPELs) has been successfully synthesized by polymerization of diphenylphosphine and bis(aryl triflate)s. The bis(aryl triflate)s are readily prepared frombisphenols, some of which are commodity feedstocks such as bisphenol A. The polymerization via palladium catalyzed P–C bond formation produces degrees of polymerization up to 65. All polymeric triflates have reasonable thermal stability in the
Composition for film formation and material for insulating film formation
申请人:JSR CORPORATION
公开号:US20020172652A1
公开(公告)日:2002-11-21
A composition for film formation capable of forming a coating film excellent in low dielectric constant characteristics, cracking resistance, modulus of elasticity, and adhesion to substrates and useful as an interlayer insulating film material in semiconductor devices, etc. The composition for film formation contains (A) at least one member selected from an aromatic polyarylene and an aromatic poly (arylene ether), (B) a polyvinylsiloxane, and (C) an organic solvent.
Nickel‐Catalyzed Reductive C−Ge Coupling of Aryl/Alkenyl Electrophiles with Chlorogermanes
作者:Pei‐Feng Su、Ke Wang、Xuejing Peng、Xiaobo Pang、Peng Guo、Xing‐Zhong Shu
DOI:10.1002/anie.202112876
日期:2021.12.13
A new C−Ge bond-forming framework was established, which bridges a gap between a recently developed mild coupling technique and organogermane chemistry. The method provides a mild approach for the synthesis of both aryl and alkenyl germanes, with improved molecular diversity and structural complexity, using readily available carbon electrophiles and chlorogermanes as starting materials.