40516-46-9Relevant articles and documents
Selective reduction of mono- and disubstituted olefins by NaBH4 and catalytic RuCl3
Sharma, Pawan K.,Kumar, Surender,Kumar, Pawan,Nielsen, Poul
, p. 8704 - 8708 (2008/03/14)
Direct use of the relatively inexpensive reagent, RuCl3 × H2O, as a catalyst for the reductions of olefins in the presence of water is reported. The combination of cheap and readily available sodium borohydride and a catalytic amount of RuCl3 × H2O selectively reduces mono- and disubstituted olefins, whereas trisubstituted olefins, unless activated, and benzyl ethers remain inert.
Structural studies on dioxan-2-ylium ions: intramolecular attack of an oxygen atom on a carbenium ion centre
Childs, Ronald F.,Kang, Guogong J.,Wark, Teresa A.,Frampton, Christopher S.
, p. 2084 - 2093 (2007/10/02)
As models for the ionization of orthoesters, a series of 1,3-dioxan-2-ylium salts have been prepared and characterized.The properties of 1,3-dioxan-2-ylium hexachloroantimonate 1, 5-ethoxymethyl-1,3-dioxan-2-ylium hexachloroantimonate 2, 2-methyl-5-ethoxymethyl-1,3-dioxan-2-ylium hexachloroantimonate 3, and 2-phenyl-5-ethoxymethyl-1,3-dioxan-2-ylium hexachloroantimonate 4, have been studied by 1H and 13C NMR spectroscopy.The structures of 3 and 4 have been determined using X-ray crystallography.Salts 3 and 4 both crystallize in monoclinic crystal systems.For 3, the space group is C2/c, with a=30.192(4) Angstroem, b=9.613(2) Angstroem, c=12.742(2) Angstroem, β=109.71(1) deg, V=3482(1) Angstroem3, and Z=8.Complex 4 crystallizes in the space group P21/n, with a=10.638(2) Angstroem, b=11.849(2) Angstroem, c=16.970(3) Angstroem, β=106.84(1) deg, V=2047(1) Angstroem3, and Z=4.The geometries of 3 and 4 are similar with the ether oxygen disposed over the dioxan-2-ylium ring.However, the interaction between the ether oxygen and the cationic centre is not significant due to the large internuclear distance observed.The cation 5, in which the carbon chain length between the ether oxygen and C(5) was increased, was prepared.This ion was found to undergo a reversible, intramolecular rearrangement resulting in the formation of 1-methyl-4-acetoxymethyl-tetrahydroguranyl oxonium hexachloroantimonate 11.