Related Products of 827-61-2, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 827-61-2, Name is Quinuclidin-3-yl acetate, molecular formula is C9H15NO2. In a Article£¬once mentioned of 827-61-2
A practical chemoenzymatic process to access (R)-quinuclidin-3-ol on scale
(¡À)-3-Butyryloxyquinuclidinium butyrate 6 (2 M, 571 g/L), prepared from (¡À)-quinuclidin-3-ol 1 and butyric anhydride, undergoes enantioselective hydrolysis by an Aspergillus melleus protease {1.0% (w/v)} in water in the presence of Ca(OH)2 to keep the reaction at pH 7 and trap butyric acid that is introduced as part of (¡À)-6 and generated by the enzymatic hydrolysis. After a 24 h period, extraction with n-heptane provides (R)-quinuclidin-3-yl butyrate 5a, which, on methanolysis with Na2CO3, is converted into (R)-1, a common pharmacophore of neuromodulators acting on muscarinic receptors, in 96% ee and 42% overall yield from (¡À)-1. The unwanted antipode (S)-1, which is extracted into n-butanol and purified via its hydrochloride salt in 89% ee and 40% overall yield from (¡À)-1, can be racemized by the catalysis of Raney Co at 140C under an atmosphere of H2 (5 kg/cm2) to regenerate (¡À)-1 in 97% yield.
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Reference£º
Quinuclidine – Wikipedia,
Quinuclidine | C7H75N | ChemSpider