44657-76-3Relevant academic research and scientific papers
Lithium-titanium exchange of tertiary α-sulfonyl carbanions: Synthesis, structure, dynamics and reactivity of bis(1-sulfonylalkyl) titaniums
Hess, Thomas,Raabe, Gerhard,Gais, Hans-Joachim
, p. 7134 - 7147 (2015/03/04)
Lithium-titanium exchange of tertiary α-sulfonyl carbanions with ClTi(OiPr)3 and Cl2Ti(OiPr)2 in diethyl ether gave bis(1-sulfonylalkyl) titaniums and not the corresponding (1-sulfon-ylalkyl) titaniums. X-ray crystal structure analysis of di(iso-propoxy) bis[1-(phenylsulfonyl) cyclobutyl]titanium and di-(isopropoxy) bis[1-(phenylsulfonyl) isopropyl]titanium showed asymmetric distorted octahedral complexes, having hexaco-ordinate Ti atoms, two C-Ti bonds, four Ti-O bonds, and two four-membered Ti-O-S-Cα rings. According to 1H NMR spectroscopy bis(1-sulfonylcycloalkyl) titaniums are non-flux-ional at room temperature. This suggests that chiral bis(1-sulfonylalkyl) titaniums should be configurationally stable. The bis(1-sulfonylalkyl) titaniums are stable at room temperature towards β-H elimination. They selectively add to benzaldehyde in the presence of acetophenone but do not react with methyl iodide. The reaction of tertiary acyclic α-sulfonyl carbanions with ClTi(OiPr)3 in tetrahydrofuran (THF) gives different titanium derivatives with unspecified structures, which not only selectively react with benzaldehyde in the presence of acetophenone but are also alkylated by methyl iodide.
25-SO2-SUBSITUTED ANALOGS OF 1α,25-DIHYDROXYVITAMIN D3
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Page 91-92, (2010/02/07)
The present invention provides novel D-ring and side-chain analogs of lα,25-dihydroxyvitamin D3, compositions comprising these compounds and methods of using these compounds as selective inhibitors of CYP24. In particular, the compounds of the
Catalytic process for the production of mercaptans from thioethers
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, (2008/06/13)
A catalytic process for the production of mercaptans from thioethers, which comprises reacting a thioether, in which the sulfur atom of the thioether function is bonded, on the one hand to a tertiary carbon atom and, on the other hand, to a primary or secondary carbon atom, with hydrogen sulfide in the presence of an appropriate acid catalyst, especially an aluminosilicate or an ion-exchange resin.
Preparation of Alkanesulfenamides by Selective Elimination of t-Butyl Group in S-Alkyl-S-t-butylsulfilimines
Yamamoto, Tamotsu,Kakimoto, Masa-aki,Maejima, Takeshi,Okawara, Makoto
, p. 1249 - 1250 (2007/10/02)
N-Tosylalkanesulfenamides have been prepared via the reaction of alkyl halides with 2-methyl-2-propanethiolate followed by S-imination with chloramine T and the thermolysis.This method comprises the use of selective elimination of t-butyl group in S-alkyl
Preparation of Stable β-Sultines. Crystal Structure of 2,2-Bis-(p-fluorophenyl)-3,3-dimethyl-1,2-oxathietan 2-Oxide
Gray, Michael D. M.,Russell, David R.,Smith, David J. H.,Durst, Tony,Gimbarzevsky, Boris
, p. 1826 - 1830 (2007/10/02)
Three 4,4-diaryl-3,3-dimethyl-1,2-oxathietan 2-oxides were prepared by the oxidative cyclisation of 2-hydroxyalkyl t-butyl sulphoxides.They decomposed readily to 1,1-diaryl-2-methylprop-1-enes, but two of them were isolated in crystalline form.The determi
