1219735-46-2Relevant academic research and scientific papers
Preparation and photophysical properties of phosphino- and phosphine oxide-linked siloles
Braddock-Wilking, Janet,Gao, Li-Bin,Rath, Nigam P.
experimental part, p. 1612 - 1621 (2010/06/13)
1,1-dimethyl-2,5-disubstituted-3,4-diphenylsiloles terminated at the 2,5-positions with a phosphino or phosphine oxide group were prepared. All reactions were carried out under an inert atmosphere of argon or nitrogen using standard Schlenk techniques or a drybox using solvents dried by standard procedures. The phosphine oxide-linked silole was prepared in 17% yield from the reaction of 1,1-dimethyl-2,5-bis(4-bromophenyl)-3,4-diphenylsilole with diphenyl(4-ethynyl phenyl)-phosphine oxide in the presence of CuI, Pd(PPh 3)4, and NEt3. The 13C{ 1H} NMR spectra for the siloles 1-5 and 9 all exhibit resonances generally above about 135 ppm for the silole ring carbons, and the Si{ 1H} resonances were generally observed near 8-9 ppm except for siloles 1a and 1b, which were shifted slightly downfield at 15 and 20 ppm.
