In an article, author is Peng, Xiaolin, once mentioned the application of 554-62-1, Product Details of 554-62-1, Name is Phytosphingosine, molecular formula is C18H39NO3, molecular weight is 317.51, MDL number is MFCD02259274, category is chiral-catalyst. Now introduce a scientific discovery about this category.
A dual catalytic chemo-selective cross-coupling reaction of two enals is developed. One enal (without alpha-substitution) is activated by an NHC catalyst to form an acylazolium enolate intermediate that undergoes Michael-type addition to another enal molecule bearing an alkynyl substituent. Mechanistic studies indicate that non-covalent interactions between the alkynyl enal and the NHC center dot HX catalyst play important roles in substrate activation and enantioselectivity control. Many of the possible side reactions are not observed. Our reaction provides highly chemo- and diastereo-selective access to chiral lactones containing functionalizable 1,3-enyn units with excellent enantioselectivities (95 to >99% ee).
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Reference:
Chiral Catalysts,
,Chiral catalysts – SlideShare