Kickova, Anna published the artcileSynthesis and properties of macrocyclic diazene switch with binaphthalene unit attached via acrylamide linkers, Recommanded Product: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), the publication is Chemical Papers (2013), 67(1), 101-109, database is CAplus.
2,2′-Diiodo-1,1′-binaphthalene undergoes a tandem Heck reaction with Me acrylate to afford 2-(7H-dibenzo[c,g]fluoren-7-ylidene)acetic acid Me ester. As a consequence, a target macrocyclic diazene with binaphthalene unit attached by an acrylamide linker was prepared by a stepwise building of acrylamide at a binaphthalene moiety, including the Doebner modification of the Knoevenagel condensation, and completed by oxidative macrocyclization of aniline end-groups. The synthesis of the target compounds was achieved using (R)-2,2′-diiodo-1,1′-binaphthalene as a starting material. Despite being an equimolar mixture of monomer and dimer, it exhibited remarkable changes in CD spectra ldue to reversible (E/Z) isomerization of N=N diazene bonds upon irradiation at 365/465 nm. The title compounds thus formed included a macrocyclic azole propenamide binaphthalene (I) (monomer) and a corresponding dimer. Although the dimer isomerizes from (E) to (Z) isomer 7.4 times faster than the monomer I the latter’s contribution to the change in ellipticity at 307 nm in the photostationary state is 2.4 times greater.
Chemical Papers published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, Recommanded Product: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate).
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https://en.wikipedia.org/wiki/Ester,
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