Endophyte composition and Cinchona alkaloid production abilities of Cinchona ledgeriana cultivated in Japan
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Natural Medicines"
DOI: 10.1007/s11418-018-1273-z
Abstract: New eight endophytic filamentous fungi were isolated from the young stems of Cinchona ledgeriana (Rubiaceae) cultivated in Japan. They were classified into four genera based on phylogenetic analysis of the nucleotide sequences of the internal… read more here.
Keywords: cinchona alkaloid; cultivated japan; endophyte composition; cinchona ledgeriana ... See more keywords
Synthesis of cinchona alkaloid squaramide polymers as bifunctional chiral organocatalysts for the enantioselective michael addition of β-ketoesters to nitroolefins
Sign Up to like & getrecommendations! Published in 2017 at "Molecular Catalysis"
DOI: 10.1016/j.mcat.2017.06.010
Abstract: Abstract Novel chiral polymers containing cinchona-based squaramides in their main chain structure were designed. We synthesized chiral squaramides bearing two cinchona moieties, which contain double bonds. Repeated Mizoroki-Heck reactions between the double bonds of the… read more here.
Keywords: michael addition; ketoesters nitroolefins; addition ketoesters; cinchona ... See more keywords
ADMET Polymerization of Dimeric Cinchona Squaramides for the Preparation of a Highly Enantioselective Polymeric Organocatalyst
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DOI: 10.3390/catal10050591
Abstract: Under the acyclic diene metathesis (ADMET) reaction condition, the C3-vinyl groups of cinchona alkaloids readily react with each other to form a C-C bond. A novel type of cinchona alkaloid polymers was synthesized from dimeric… read more here.
Keywords: polymerization dimeric; admet polymerization; cinchona squaramides; reaction ... See more keywords
Comparison of Cinchona Catalysts Containing Ethyl or Vinyl or Ethynyl Group at Their Quinuclidine Ring
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DOI: 10.3390/ma12183034
Abstract: Numerous cinchona organocatalysts with different substituents at their quinuclidine unit have been described and tested, but the effect of those saturation has not been examined before. This work presents the synthesis of four widely used… read more here.
Keywords: ethynyl; ethyl vinyl; vinyl; vinyl ethynyl ... See more keywords