Romanov-Michailidis, Fedor published the artcileEnantioselective Organocatalytic Fluorination-Induced Wagner-Meerwein Rearrangement, Formula: C50H65O4P, the publication is Angewandte Chemie, International Edition (2013), 52(35), 9266-9270, database is CAplus and MEDLINE.
The synthesis of the target compounds was achieved (optimized conditions) using 1-(chloromethyl)-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane tetrafluoroborate(1-) (Selectfluor) as fluorination agent and a chiral dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin 4-oxide as catalyst. The title compounds thus formed included 3′,4′-dihydro-2′-(fluoro)spiro[cyclopentane-1,1′(2′H)-naphthalen]-2-one derivatives, 3′,4′-dihydro-2′-(fluoro)spiro[cyclobutane-1,1′(2′H)-naphthalen]-2-one derivatives and 3′,4′-dihydro-2′-(fluoro)spiro[cyclohexane-1,1′(2′H)-naphthalen]-2-one derivatives The title compounds thus formed included a chiral spiro[cyclobutane-naphthalenone] derivative (I). Reactants included 1-(3,4-dihydro-1-naphthalenyl)cyclobutanol, 1-(2H-1-benzopyran-4-yl)cyclobutanol, 1-(3,4-dihydro-1-naphthalenyl)cyclopentanol 1-(3,4-dihydro-1-naphthalenyl)cyclopropanol etc.
Angewandte Chemie, International Edition published new progress about 929294-27-9. 929294-27-9 belongs to chiral-phosphine-ligands, auxiliary class Chiral Phosphoric Acids, name is R-3,3′-Bis(2,4,6-triisopropylphenyl)-5,5′,6,6′,7,7′,8,8′-octahydro-1,1′-binaphthyl-2,2′-diyl hydrogenphosphate, and the molecular formula is C50H65O4P, Formula: C50H65O4P.
Referemce:
https://en.wikipedia.org/wiki/Phosphine_ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate