1007877-57-7Relevant articles and documents
Development of Chiral Organosuperbase Catalysts Consisting of Two Different Organobase Functionalities
Kondoh, Azusa,Oishi, Masafumi,Terada, Masahiro,Tezuka, Hikaru
supporting information, p. 7472 - 7477 (2020/03/19)
In the field of chiral Br?nsted base catalysis, a new generation of chiral catalysts has been highly anticipated to overcome the intrinsic limitation of pronucleophiles that are applicable to the enantioselective reactions. Herein, we reveal conceptually new chiral Br?nsted base catalysts consisting of two different organobase functionalities, one of which functions as an organosuperbase and the other as the substrate recognition site. Their prominent activity, which stems from the distinctive cooperative function by the two organobases in a single catalyst molecule, was demonstrated in the unprecedented enantioselective direct Mannich-type reaction of α-phenylthioacetate as a less acidic pronucleophile. The present achievement would provide a new guiding principle for the design and development of chiral Br?nsted base catalysts and significantly broaden the utility of Br?nsted base catalysis in asymmetric organic synthesis.
Entropy-controlled catalytic asymmetric 1,4-type Friedel-crafts reaction of phenols using conformationally flexible guanidine/bisthiourea organocatalyst
Sohtome, Yoshihiro,Shin, Bongki,Horitsugi, Natsuko,Takagi, Rika,Noguchi, Keiichi,Nagasawa, Kazuo
supporting information; experimental part, p. 7299 - 7303 (2010/11/04)
Soft and weak cooperation: Conformationally flexible organic compounds were found to promote the title transformation. These "soft" organocatalysts, which are able to control processes through the differential activation entropies (ΔΔS*S-R) of
COMPOSITIONS AND METHODS FOR INHIBITING CYTOCHROME P450
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Page/Page column 46, (2008/06/13)
Methods of inhibiting cytochrome P450 enzymes are provided that can be used for improving the treatment of diseases by preventing degradation of drugs or other molecules by cytochrome P450. Pharmaceutical compositions are provided that can act as boosters