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methyl vinyl ketone/cinchona
Veza se sprema u međuspremnik
2 rezultatima
Enantioselective Michael addition catalyzed by cinchona alkaloids.
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Prijava Registriraj se
Enantioselective Michael additions of cyclic beta-ketoesters to methyl vinyl ketone catalyzed by cinchona alkaloids were studied. The results revealed that the induced enantioselectivity was significantly influenced by both the structure of the catalyst and that of the substrate. Interesting
Hydrogenation of cinchona alkaloids over supported Pt catalyst.
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Prijava Registriraj se
The heterogeneous catalytic hydrogenation of two isomeric cinchona alkaloids, cinchonidine and cinchonine, was studied over Pt/Al(2)O(3) in 1N H(2)SO(4) solution under 100 bar H(2) at 25 degrees C. Cinchonidine was transformed into two diastereomeric hexahydroderivatives by hydrogenation of ring A
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