675-62-7Relevant articles and documents
Catalytic Hydrosilylation of Hydrofluoroolefins (HFOs): Synthesis of New Fluorinated Silanes and Diversity of their Synthetic Character
Pavlenko, Natalia V.,Peng, Sheng,Petrov, Viacheslav,Jackson, Andrew,Sun, Xuehui,Sprague, Lee,Yagupolskii, Yurii L.
, p. 5425 - 5435 (2020/08/14)
New polyfluorinated silanes were synthesized via the Pt, Rh and Pd catalyzed hydrosilylation of commercially available hydrofluoroolefins (HFOs) in moderate to excellent yields. HFO-1234yf (2,3,3,3-tetrafluoropropene-1) and –1234ze (1,3,3,3-tetrafluoropropene-1) were reactive with Pt catalyst to form tetrafluoropropylsilanes along with defluorosilylation products. The Z- and E-isomers of HFO-1336mzz (1,1,1,4,4,4-hexafluorobut-2-ene) gave the desired silanes with Pd catalysis in good to excellent yields, while with Pt catalyst only the dehydrofluorination product CF2=CHCH2CF3 (HFO-1345czf, 1,1,4,4,4-pentafluorobut-1-ene) was obtained. Synthetic applications of the new polyfluorinated silanes were illustrated by conversion of dichloro(hexafluorobutyl)(methyl)silane to the cyclic trisiloxane, which can serve as a monomer for the preparation of polysiloxanes. In addition, the hexafluorobutylsilanes showed defluorinative reactivity with lithium reagents, thereby demonstrating their synthetic utility as valuable building blocks for further transformations via C–F and C-Si bond activation.
Redistribution of dichlorosilanes and dihydridosilanes. Synthesis of chloro hydridosilanes
Benouargha,Boulahia,Boutevin,Caporiccio,Guida-Pietrasanta,Ratsimihety
, p. 79 - 87 (2007/10/03)
The redistribution of dichlorosilanes RSi(CH3)Cl2 and dihydridosilanes RSi(CH3)H2, prepared by reduction of the homologues dichlorosilanes, in the presence of a quaternary ammonium salt is presented. The influence of the nature of R (fluoroalkyl chain RFCH2CH2 with RF = CF3, C4F9, C8F17, alkyl chain R = C6H13 or aromatic R = C6H5) and of the temperature on the rate of the reaction is studied. The equilibrium constants and free enthalpies are calculated and discussed taking into account the nature of R. The new products described were characterized from I.R, 1H, 19F and 29Si NMR spectroscopies.