For a series of 6-(4-methylphenylsulphonyl)amino-1-triisopropylsilyl(oxy)-cyclohexenes the preferred conformation, in the solid state, has the –NHTs (Ts = 4-methylphenylsulphonyl) group in an axial orientation; if the axial-NHTs group experiences a 1,3-diaxial interaction with a methyl group, the equatorial conformation becomes the thermodynamically more stable form.
Hydrosilylation of enones: platinum divinyltetramethyldisiloxane complex in the preparation of triisopropylsilyl and triphenylsilyl enol ethers
作者:Carl R. Johnson、Raj K. Raheja
DOI:10.1021/jo00088a006
日期:1994.5
Enones are regioselectively converted to triisopropylsilyl and triphenylsilyl enol ethers in high yields using triisopropylsilane or triphenylsilane and platinum divinyltetramethyldisiloxane complex 1 (Karstedt's catalyst).
Regioselective preparation of α-nitro cyclohexyl triisopropylsilyl enol ethers
作者:P.Andrew Evans、James M. Longmire
DOI:10.1016/s0040-4039(00)74403-0
日期:1994.11
Treatment of the triisopropylsilyl enol ethers 1a-h with tetra-n-butyl ammonium nitrate and trifluoroaceric anhydride at 0 degrees C afforded the alpha-nitro triisopropylsilyl enol ethers 2a-h in 40-72% yield.
Johnson Carl R., Raheja Raj K., J. Org. Chem, 59 (1994) N 9, S 2287-2288