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Volumn 50, Issue 51, 2011, Pages 12189-12192

Enantioselective diels-alder reactions with anomalous endo/exo selectivities using conformationally flexible chiral supramolecular catalysts

Author keywords

acroleins; asymmetric catalysis; cycloaddition; cyclopentadiene; supramolecular catalysis

Indexed keywords

ACROLEINS; ARYLBORONIC ACIDS; ASYMMETRIC CATALYSIS; CHIRAL DIOLS; CYCLOPENTADIENES; DIELS-ALDER REACTION; DIENOPHILES; ENANTIOSELECTIVE DIELS-ALDER REACTIONS; HIGH ENANTIOSELECTIVITY; IN-SITU; SUPRAMOLECULAR CATALYSIS; SUPRAMOLECULAR CATALYSTS; TRIS(PENTAFLUOROPHENYL) BORANE;

EID: 83755184091     PISSN: 14337851     EISSN: 15213773     Source Type: Journal    
DOI: 10.1002/anie.201106497     Document Type: Article
Times cited : (61)

References (55)
  • 32
    • 0032558078 scopus 로고    scopus 로고
    • We used 4 Ã molecular sieves according to the reported procedure, as they might promote the complexation of boron BINOLates and remove coordinated water from the complexes
    • We used 4 Ã molecular sieves according to the reported procedure, as they might promote the complexation of boron BINOLates and remove coordinated water from the complexes., K. Ishihara, H. Kurihara, M. Matsumoto, H. Yamamoto, J. Am. Chem. Soc. 1998, 120, 6920.
    • (1998) J. Am. Chem. Soc. , vol.120 , pp. 6920
    • Ishihara, K.1    Kurihara, H.2    Matsumoto, M.3    Yamamoto, H.4
  • 37
    • 83755161482 scopus 로고    scopus 로고
    • note
    • Low catalytic activities of 5-a, (5-a + 6-a), and (5-a + 7) are reasonable. The BrÃnsted acidity of 5-a is not sufficient to catalyze the reaction. For the (5-a + 7) catalyst, the phosphoryl moieties of 5-a coordinate to 7, and thus the Lewis acidity of 7 is decreased. For the (5-a + 6-a) catalyst, the corresponding boron BINOLate is not reactive because it lacks the conjugated activation by Lewis acid 7. Therefore, the catalytic activity of the conjugates based on 5-a decreased if either 6-a or 7 were not present.
  • 41
    • 83755161483 scopus 로고    scopus 로고
    • For the exo-selective Diels-Alder reaction of 2-c
    • For the exo-selective Diels-Alder reaction of 2-c, see
  • 55
    • 83755170486 scopus 로고    scopus 로고
    • note
    • -1. See the Supporting Information for the detailed results.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.