In an article, author is Zhou, Li, once mentioned the application of 146439-94-3, Name: H-SER-ILE-LYS-VAL-ALA-VAL-OH, Name is H-SER-ILE-LYS-VAL-ALA-VAL-OH, molecular formula is C8H9FO, molecular weight is 615.76, MDL number is N/A, category is chiral-catalyst. Now introduce a scientific discovery about this category.
Facile synthesis of high optically active helical polymers from achiral monomers still remains a great challenge. In this work, two chiral Ni(II) catalysts bearing chiral R- or S-2a ligands were facilely prepared which can efficiently initiate the living/controlled polymerization of allene monomers and afford well-defined polyallenes in high yields with controlled molecular masses (M(n)s) and low molecular mass distributions (M-w/M(n)s). The catalysts showed interesting regioselectivity on the cumulated double bonds of allene monomers, as the polymerizations were highly selective which occurred on 2,3-double bonds. Moreover, the polymerization of achiral allene monomers using chiral Ni(II) catalysts showed remarkable helix-sense selectivity. The yielded polyallenes exhibited high optical activity due to the formation of a predominant one-handed helix as revealed by circular dichroism, UV-vis, and direct atomic force microscopy (AFM) observations as well. The predominant one-handed helicity of the generated polyallenes was solely determined by the chirality of the Ni(II) catalysts.
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Reference:
Chiral Catalysts,
,Chiral catalysts – SlideShare