Fujii, Kohei published the artcileDesign of Phosphinic Acid Catalysts with the Closest Stereogenicity at the α-Position: Synthesis and Application of α-Stereogenic Perfluoroalkyl Phosphinic Acid Catalysts, Name: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), the publication is Organic Letters (2019), 21(9), 3387-3391, database is CAplus and MEDLINE.
Chiral C2-sym. phosphinic acids I (17a,b; R = CF3, C2F5) were designed as chiral Bronsted acid organocatalysts, based on sterically demanding and helical chiral perfluoroalkyl groups at the closest α-position advancing asym. reaction environment and catalytic activity. The perfluoroalkyl catalysts, [(CF3)2F2] and [(C2F5)2F2] phosphinic acids, were synthesized via a stereoselective addition/cyclization sequence of Me phosphinate and deoxofluorination. These new classes of Bronsted acid catalysts were applied to an asym. Friedel-Crafts reaction to give up to 89% yield and 82% R-enantioselectivity, which is higher than those obtained with the parent phosphoric acid (42% and 55.5% S).
Organic Letters 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, Name: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate).
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