Synthesis of anovel sterically hindered imidazolinium chloride: An N-heterocyclic carbene precursor
A hindered imidazolinium chloride which is a bulky, strongly donating N-heterocyclic carbene precursor has been synthesised from pinacolone in six steps. The chlorides can be easily converted to its corresponding hexafluorophosphate salt in near quantitative yield. The two new compounds were characterised by 1H and 13C NMR, IR, and elemental analyses.
Thiadiaziridine 1,1-Dioxides: Synthesis and Chemistry
The synthesis and chemical reactions of a series of thiadiaziridine 1,1-dioxides (2) are described.The thermal stability is highly dependent on the R group and in one case (R = tert-octyl) is postulated that the thermolysis initially produces a diradical intermediate which can be trapped or further fragments to give a nitrene.A temperature-dependent NMR study on the coalescence of the diastereotopic α-methyl protons of 2b gives a ΔG = 20 kcal*mol-1.
Timberlake, Jack W.,Alender, Jeff,Garner, Archie W.,Hodges, Melvin L.,Oezmeral, Cenan,et al.
p. 2082 - 2089
(2007/10/02)
Substituted tert-hexylamines as newer type of hypotensive compound.
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VEJDELEK,TRCKA
p. 215 - 216
(2007/10/05)
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