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Volumn 2, Issue 2, 2007, Pages 257-264

Catalytic asymmetric epoxidation of α,β-unsaturated esters with chiral yttrium-biaryldiol complexes

Author keywords

Asymmetric catalysis; Asymmetric synthesis; Epoxidation; Rare earth metals; Yttrium

Indexed keywords

EPOXIDE; ESTER; OXAZINE DERIVATIVE; PHENYLPROPIONIC ACID DERIVATIVE; RAGAGLITAZAR; YTTRIUM;

EID: 34248189099     PISSN: 18614728     EISSN: 1861471X     Source Type: Journal    
DOI: 10.1002/asia.200600309     Document Type: Article
Times cited : (31)

References (72)
  • 1
    • 84891568337 scopus 로고    scopus 로고
    • For recent general reviews on asymmetric epoxidations, see: a, Ed, J. E. Bäckvall, Wiley-VCH, Weinheim
    • For recent general reviews on asymmetric epoxidations, see: a) Modern Oxidation Methods (Ed.: J. E. Bäckvall), Wiley-VCH, Weinheim, 2004;
    • (2004) Modern Oxidation Methods
  • 5
    • 0034698317 scopus 로고    scopus 로고
    • For recent general reviews on asymmetric epoxidation of electron-deficient C=C bonds, see: a M. J. Porter, J. Skidmore, Chem. Commun. 2000, 1215;
    • For recent general reviews on asymmetric epoxidation of electron-deficient C=C bonds, see: a) M. J. Porter, J. Skidmore, Chem. Commun. 2000, 1215;
  • 9
    • 84985609389 scopus 로고
    • 929; for other examples, see reviews in reference [2
    • Angew. Chem. Int. Ed. Engl. 1980, 19, 929; for other examples, see reviews in reference [2].
    • (1980) Angew. Chem. Int. Ed. Engl , vol.19
  • 10
    • 0032975651 scopus 로고    scopus 로고
    • For reviews of catalyzed asymmetric epoxidations with chiral ketones, see: a
    • For reviews of catalyzed asymmetric epoxidations with chiral ketones, see: a) S. E. Denmark, Z. Wu, Synlett 1999, 847;
    • (1999) Synlett , pp. 847
    • Denmark, S.E.1    Wu, Z.2
  • 13
    • 4143144178 scopus 로고    scopus 로고
    • 497; for reviews of poly(amino acid)-catalyzed asymmetric epoxidation, see
    • d) D. Yang, Acc. Chem. Res. 2004, 37, 497; for reviews of poly(amino acid)-catalyzed asymmetric epoxidation, see:
    • (2004) Acc. Chem. Res , vol.37
    • Yang, D.1
  • 15
    • 33644594477 scopus 로고    scopus 로고
    • 74; for other examples of asymmetric epoxidation of enones, see reviews in references [1,2
    • f) D. R. Kelly, S. M. Roberts, Biopolymers 2006, 84, 74; for other examples of asymmetric epoxidation of enones, see reviews in references [1,2].
    • (2006) Biopolymers , vol.84
    • Kelly, D.R.1    Roberts, S.M.2
  • 17
    • 0034806851 scopus 로고    scopus 로고
    • T. Nemoto, T. Ohshima, K. Yamaguchi, M. Shibasaki, J. Am. Chem. Soc. 2001, 123, 2725; see also:
    • b) T. Nemoto, T. Ohshima, K. Yamaguchi, M. Shibasaki, J. Am. Chem. Soc. 2001, 123, 2725; see also:
  • 30
    • 0035215391 scopus 로고    scopus 로고
    • A. Solladié-Cavallo, L. Bouérat, L. Jierry, Eur. J. Org. Chem. 2001, 4557; for chiral ketone catalyst used in references [7c,d], see reference [4d].
    • g) A. Solladié-Cavallo, L. Bouérat, L. Jierry, Eur. J. Org. Chem. 2001, 4557; for chiral ketone catalyst used in references [7c,d], see reference [4d].
  • 36
  • 40
    • 21244501222 scopus 로고    scopus 로고
    • A portion of this article was previously reported as a preliminary communication: H. Kakei, R. Tsuji, T. Ohshima, M. Shibasaki, J. Am. Chem. Soc. 2005, 127, 8962.
    • A portion of this article was previously reported as a preliminary communication: H. Kakei, R. Tsuji, T. Ohshima, M. Shibasaki, J. Am. Chem. Soc. 2005, 127, 8962.
  • 41
    • 0036625219 scopus 로고    scopus 로고
    • For recent reviews of bifunctional asymmetric catalysis, see: a
    • For recent reviews of bifunctional asymmetric catalysis, see: a) M. Shibasaki, N. Yoshikawa, Chem. Rev. 2002, 1702, 2187;
    • (2002) Chem. Rev , vol.1702 , pp. 2187
    • Shibasaki, M.1    Yoshikawa, N.2
  • 43
  • 46
    • 34250845328 scopus 로고    scopus 로고
    • For mechanistic studies of epoxidation catalyzed by RE-binol complexes, see reference [5b].
    • For mechanistic studies of epoxidation catalyzed by RE-binol complexes, see reference [5b].
  • 47
    • 0242713084 scopus 로고    scopus 로고
    • 8-binol, see: T. T.-L. Au-Yeung; S.-S. Chan, A. S. C. Chan, Adv. Synth. Catal. 2003, 345, 537.
    • 8-binol, see: T. T.-L. Au-Yeung; S.-S. Chan, A. S. C. Chan, Adv. Synth. Catal. 2003, 345, 537.
  • 48
    • 0008757162 scopus 로고    scopus 로고
    • For synthesis of 6,6′-disubstituted 2,2′-biphenyldiols, see: a
    • For synthesis of 6,6′-disubstituted 2,2′-biphenyldiols, see: a) T. Harada, T. M. T. Tuyet, A. Oku, Org. Lett. 2000, 2, 1319;
    • (2000) Org. Lett , vol.2 , pp. 1319
    • Harada, T.1    Tuyet, T.M.T.2    Oku, A.3
  • 58
    • 0345733904 scopus 로고    scopus 로고
    • K. Majima, R. Takita, A. Okada, T. Ohshima, M. Shibasaki, J. Am. Chem. Soc. 2003, 125, 15837, and references therein; see also the review:
    • c) K. Majima, R. Takita, A. Okada, T. Ohshima, M. Shibasaki, J. Am. Chem. Soc. 2003, 125, 15837, and references therein; see also the review:
  • 60
    • 34250800042 scopus 로고    scopus 로고
    • Previous mechanistic studies suggested that the concentration of the catalyst is important to maximize the formation of the active species in equilibrium; see reference [5b, Similar effects were observed in asymmetric epoxidations in which a samarium complex was used; see reference [10
    • Previous mechanistic studies suggested that the concentration of the catalyst is important to maximize the formation of the active species in equilibrium; see reference [5b]. Similar effects were observed in asymmetric epoxidations in which a samarium complex was used; see reference [10].
  • 61
    • 0033533478 scopus 로고    scopus 로고
    • +) observed by use of tandem mass spectrometry (M=rare-earth metal, hmpa = hexamethylphosphoramide); see: a) H. Tsuruta, K. Yamaguchi, T. Imamoto, Chem. Commun. 1999, 1703;
    • +) observed by use of tandem mass spectrometry (M=rare-earth metal, hmpa = hexamethylphosphoramide); see: a) H. Tsuruta, K. Yamaguchi, T. Imamoto, Chem. Commun. 1999, 1703;
  • 63
    • 33646069329 scopus 로고    scopus 로고
    • 3 of the same quality is also available from Aldrich. See also: M. Shibasaki, M. Kanai, S. Matsunaga, Aldrichimica Acta 2006, 39, 31.
    • 3 of the same quality is also available from Aldrich. See also: M. Shibasaki, M. Kanai, S. Matsunaga, Aldrichimica Acta 2006, 39, 31.
  • 64
    • 34250831867 scopus 로고    scopus 로고
    • Among the molecular sieves, the use of 4-Å molecular sieves gave the best results in terms of enantioselectivity and yield of epoxides. For example, the epoxidation of 2b with 2 mol% Y(OiPr)3, S)-1a, and Ph3As(O) gave 3b in 89% yield (36 h, 99% ee with 4-Å molecular sieves (Table 5, entry 1, whereas 3b was obtained in 62% yield (48 h) and 96% ee with 3 -Å molecular sieves, 81% yield (48 h) and 98% ee with 5-Å molecular sieves, 28% yield (48 h) and 93% ee with MS 13X, and 7% yield (48 h) and 94% ee without molecular sieves. A similar trend was observed with the Y(OiPr)3, S)-1b, and Ph3P(O) system. The reaction of 2r gave 3r in 87% yield (24 h) and 97% ee with 4-Å molecular sieves (Table 8, entry 1, 10 mol% catalyst, 52% yield (30 h) and 90% ee with 3-Å molecular sieves, 76% yield (30 h) and 93% ee with 5-Å molecular sieves, 8% yield (30 h) and 97% ee with MS 13X, and 14% yield (30 h) and 85% ee wi
    • 3P(O) system. The reaction of 2r gave 3r in 87% yield (24 h) and 97% ee with 4-Å molecular sieves (Table 8, entry 1, 10 mol% catalyst), 52% yield (30 h) and 90% ee with 3-Å molecular sieves, 76% yield (30 h) and 93% ee with 5-Å molecular sieves, 8% yield (30 h) and 97% ee with MS 13X, and 14% yield (30 h) and 85% ee without molecular sieves.
  • 65
    • 34250794806 scopus 로고    scopus 로고
    • 3P(O) is required. For a discussion, see references [5b,c].
    • 3P(O) is required. For a discussion, see references [5b,c].
  • 72
    • 34250865353 scopus 로고    scopus 로고
    • The enantiomeric excess was determined after epoxide-ring opening; see Supporting Information
    • The enantiomeric excess was determined after epoxide-ring opening; see Supporting Information.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.