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Matches in SemOpenAlex for { <https://semopenalex.org/work/W1999074525> ?p ?o ?g. }

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• W1999074525 abstract "A new Brønsted acid-assisted chiral Brønsted (chiral BBA) acid catalyst (1) was developed by substituting a hydroxy group of optically active 1,1‘-bi(2-naphthol) with a stronger Brønsted acidic group such as a bis(trifluoromethanesulfonyl)methyl group. The enantioselective Mannich-type reaction of ketene silyl acetals with aldimines catalyzed by (R)-1 in the presence of stoichiometric achiral proton sources gave (S)-β-amino esters in high yield with moderate to good enantiomeric excesses." @default.
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• W1999074525 date "2006-06-24" @default.
• W1999074525 modified "2023-10-12" @default.
• W1999074525 title "Design of Brønsted Acid-Assisted Chiral Brønsted Acid Catalyst Bearing a Bis(triflyl)methyl Group for a Mannich-Type Reaction" @default.
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• W1999074525 doi "https://doi.org/10.1021/ol060939a" @default.
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