Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is Gicquiaud, Julien, once mentioned the application of 145-42-6, Name is Monosodium taurocholate, molecular formula is C26H44NNaO7S, molecular weight is 537.69, MDL number is MFCD00150819, category is chiral-catalyst. Now introduce a scientific discovery about this category, COA of Formula: C26H44NNaO7S.
The first example of an enantioselective carbocyclization of an alkyne-containing substrate catalyzed by chiral Bronsted acids was achieved. The use of the 2-hydroxynaphthyl substituent on the alkyne as a directing group constituted the key parameter enabling both efficient regioselective protonation of the carbon-carbon triple bond and chiral induction. The key cationic intermediate could be depicted either as a cationic vinylidene ortho-quinone methide or a stabilized vinyl cation. Atropoisomeric phenanthrenes derivatives were produced in high yields and good enantioselectivities under mild, metal-free reaction conditions in the presence of chiral N-triflylphosphoramide catalysts. The carbenic nature of the cationic intermediate was also exploited to describe an example of alkyne/alkane cycloisomerization.
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Reference:
Chiral Catalysts,
,Chiral catalysts – SlideShare