Zhao, Wen-Tao; Lu, Zhuo-Qun; Zheng, Hanliang; Xue, Xiao-Song; Zhao, Dongbing published the artcile< Rhodium-Catalyzed 2-Arylphenol-Derived Six-Membered Silacyclization: Straightforward Access toward Dibenzooxasilines and Silicon-Containing Planar Chiral Metallocenes>, Electric Literature of 81107-97-3, the main research area is rhodium catalyst arylphenol silacyclization stereoselective; benzooxasiloline dibenzooxasiline silicon planar chiral metallocene preparation photophys property; crystal structure mol chiral ferrocene silyl cyclic preparation optimized.
The C/Si switch strategy has been regarded as a useful and efficient strategy for the discovery of drugs and materials. Thus, development of a methodol. to access diverse silacycles is of great significance and in great demand. Among these, C-H bond silylation provides a powerful and straightforward synthetic method to form diverse silacycles in an atom- and step-economical fashion. However, C-H bond silylation has not been used to access any six-membered silicon-bridged π-conjugated scaffolds and enantioselective six-membered C-H silylation has never been presented. Herein, we successfully accessed diverse six-membered π-conjugated dibenzooxasilines via C-H bond silylation and investigated their photophys. properties. Furthermore, we realized enantioselective six-membered C-H silylation to directly afford planar chiral metallocene oxasilolanes with high ee (up to 95% ee). We also demonstrated the synthetic usefulness of dibenzooxasilines and planar chiral metallocene-fused benzooxasilolines as valuable synthetic intermediates via diverse addnl. transformations. Moreover, six-membered silicon-bridged ladder π-conjugated systems were designed and rapidly constructed by using our methods. The “”isomerization”” and “”silicon”” effects on mol. geometries and photophys. properties were also evaluated in detail.
ACS Catalysis published new progress about Chirality. 81107-97-3 belongs to class bromides-buliding-blocks, and the molecular formula is C7H4BrF3O, Electric Literature of 81107-97-3.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary