Collect. Czech. Chem. Commun. 2007, 72, 1499-1522
https://doi.org/10.1135/cccc20071499

Synthesis of Methoxy Substituted Centrally Chiral Triynes as Precursors of Functionalised Nonracemic Helicene-Like Compounds

Zuzana Krausováa,b, Petr Sehnalb, Filip Teplýa, Irena G. Staráa,b,*, Ivo Starýa,b,*, David Šamana, Josef Cvačkaa and Pavel Fiedlera

a Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
b Center for Biomolecules and Complex Molecular Systems, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic

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14. Although the chiral centre was untouched and, accordingly, the same sense of absolute stereochemistry at the asymmetric carbon atom was maintained, the CIP notation assigned an opposite configuration.
15. Note, the CIP stereodescriptor was changed from (S) back to (R) without touching chemically the chiral centre.