Design of chiral bis-phosphoric acid catalyst derived from (R)-3,3′-Di(2-hydroxy-3-arylphenyl)binaphthol: Catalytic enantioselective Diels-Alder reaction of α,β-unsaturated aldehydes with amidodienes

Norie Momiyama, Tohru Konno, Yuichi Furiya, Takeaki Iwamoto, Masahiro Terada

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

Chiral bis-phosphoric acid 1 was designed to identify a new class of structural features in chiral Brønsted acid catalysts. X-ray diffraction analysis revealed the single atropisomer 1, bearing S axial chirality at 3,3′-biaryl substituents on (R)-binaphthyl and intramolecular hydrogen bonding between the two phosphoric acid moieties. The newly designed bis-phosphoric acid 1 was evaluated in the Diels-Alder reaction of α,β-unsaturated aldehydes 4 with 1-N-acylamino-1,3-butadienes 3. After systematic variation of the catalyst substituents, as well as the N-acyl substituents of 1,3-butadiene, the use of an N-Cbz amidodiene 3a in the presence of bis-phosphoric acid 1e with a 2,4,6-tri-isopropylphenyl group was found to be optimal to yield the 1S,6R enantiomeric product 5aa in a Diels-Alder reaction of acrolein (4a). Application of this method to substituted substrates was found to be an efficient approach to the enantioselective synthesis of 3- and 3,6-substituted cyclic formylcarbamates 5. The specific character as well as the utility of 1e was further established by comparing its enantioselectivity, absolute stereochemistry, and catalytic efficiency with those of mono-phosphoric acid 2.

Original languageEnglish
Pages (from-to)19294-19297
Number of pages4
JournalJournal of the American Chemical Society
Volume133
Issue number48
DOIs
Publication statusPublished - 2011 Dec 7

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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