22972-51-6Relevant articles and documents
Highly efficient catalysts in directed oxygen-transfer processes: Synthesis, structures of novel manganese-containing heteropolyanions, and applications in regioselective epoxidation of dienes with hydrogen peroxide
B?sing, Michael,N?h, Andreas,Loose, Ina,Krebs, Bernt
, p. 7252 - 7259 (1998)
A series of novel manganese(II)-substituted polyoxometalates, [(M(II)(H2O)3)2(WO2)2(BiW9O33)2] 10-(1), [(Mn(II)(H2O))3(SbW9O33)2]12- (2), and [(Mn(II)(H2O)3)2(Mn(II)(H2O)2)2(TeW9O33)2]8- (3), were synthesized and characterized by X-ray structure analyses. The use of these oxidatively and solvolytically stable heteropolyanions as homogeneous catalysts for the epoxidation of dienes was investigated by gas chromatography/mass spectrometry, IR spectroscopy, UV-visible studies, and cyclic voltammetric measurements. The catalytic performance is exemplified by the model substrate (R)-(+)-limonene, at ambient temperatures in a biphasic system, with excellent regioselectivities, >99%, and very high turnovers even with only a small molar excess of hydrogen peroxide.
CANNABINOID DERIVATIVES, PRECURSORS AND USES
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, (2021/03/19)
The present disclosure relates to new cannabinoid derivatives and precursors and processes for their preparation. The disclosure also relates to pharmaceutical and analytical uses of the new cannabinoid derivatives.
Preparation method of (1S, 4R)-1-methyl-4-(1-methyl vinyl)-2-cyclohexene-1-alcohol
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, (2021/01/15)
The invention discloses a preparation method of (1S, 4R)-1-methyl-4-(1-methyl vinyl)-2-cyclohexene-1-alcohol, which comprises the following steps: by using D-limonene as a raw material, carrying out double bond addition and hydroxyl protection to obtain an intermediate compound; and carrying out elimination reaction and continuing deprotection to finally prepare the product. The method has the advantages of two-step continuous reaction, short process route and few byproducts, the obtained product has high chiral selectivity, and the yield is up to 70% or above and is greatly improved comparedwith the existing process.