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Volumn 14, Issue 1, 2010, Pages 58-71

Routes for the synthesis of (2S)-2-methyltetrahydropyran-4-one from simple optically pure building blocks

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EID: 77149132445     PISSN: 10836160     EISSN: 1520586X     Source Type: Journal    
DOI: 10.1021/op900163a     Document Type: Article
Times cited : (22)

References (56)
  • 1
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    • Preparation of 4-aryl-4-hydroxy-tetrahydropyrans and 3-aryl-3-hydroxy- tetrahydro- furans as 5-lipoxygenase inhibitors
    • Bird, T. G. C.; Ple, P.; Crawley, G. C.; Large, M. S. Preparation of 4-aryl-4-hydroxy-tetrahydropyrans and 3-aryl-3-hydroxy-tetrahydro- furans as 5-lipoxygenase inhibitors. EP 623614 A1, 1994.
    • (1994) EP 623614 A1
    • Bird, T.G.C.1    Ple, P.2    Crawley, G.C.3    Large, M.S.4
  • 8
    • 77149147554 scopus 로고    scopus 로고
    • The synthesis of pyranol 6 by an intramolecular Prins cyclisation between 3-buten-1-ol and acetaldehyde is reversible and can go back either to the same starting materials or to formaldehyde and 4-penten- 2-ol. The latter will undergo a Prins reaction with acetaldehyde to generate 2,6-dimethylpyran-4-ol which remains essentially unreacted in the resolution step
    • The synthesis of pyranol 6 by an intramolecular Prins cyclisation between 3-buten-1-ol and acetaldehyde is reversible and can go back either to the same starting materials or to formaldehyde and 4-penten- 2-ol. The latter will undergo a Prins reaction with acetaldehyde to generate 2,6-dimethylpyran-4-ol which remains essentially unreacted in the resolution step.
  • 9
    • 77149165208 scopus 로고    scopus 로고
    • Stereoselective preparation of 2-hydro- carbyl-2,3-dihydro-4H-pyran-4- ones
    • Mitsuda, M.; Hasegawa, J. Stereoselective preparation of 2-hydro- carbyl-2,3-dihydro-4H-pyran-4-ones. GB 2304339 A1, 1997.
    • (1997) GB 2304339 A1
    • Mitsuda, M.1    Hasegawa, J.2
  • 18
    • 0007100920 scopus 로고    scopus 로고
    • A Ru-BINAP catalyst can be used for the preparation of methyl (S)- hydroxybutyrate 36 from methyl acetoacetate; see: Wiley & Sons: New York
    • A Ru-BINAP catalyst can be used for the preparation of methyl (S)- hydroxybutyrate 36 from methyl acetoacetate; see: Kitamura, M.; Tokunaga, M.; Ohkuma, T.; Noyori, R. Organic Syntheses; Wiley & Sons: New York, 1998;
    • (1998) Organic Syntheses
    • Kitamura, M.1    Tokunaga, M.2    Ohkuma, T.3    Noyori, R.4
  • 19
    • 77149134125 scopus 로고    scopus 로고
    • Collect. Vol. 9, p 589.
    • Collect , vol.9 , pp. 589
  • 20
    • 0000155207 scopus 로고    scopus 로고
    • SEGPHOS, however, was used as ligand in place of BINAP since it gives better results for reduction of β-keto esters
    • SEGPHOS, however, was used as ligand in place of BINAP since it gives better results for reduction of β-keto esters: Saito, T.; Yokozawa, T.; Ishizaki, T.; Moroi, T.; Sayo, N.; Miura, T.; Kumobayashi, H. Adv. Synth. Catal. 2001, 343, 264.
    • (2001) Adv. Synth. Catal. , vol.343 , pp. 264
    • Saito, T.1    Yokozawa, T.2    Ishizaki, T.3    Moroi, T.4    Sayo, N.5    Miura, T.6    Kumobayashi, H.7
  • 26
    • 0000542759 scopus 로고
    • On a kilogram scale, lactone 17 was prepared from methyl-(S)- hydroxybutyrate by conversion to methyl-(S)-3-oxo-5-(tetrahydropy- ran-2-yloxy)hexanoate using methods developed from a published synthesis. followed by acid-catalysed cyclisation to (S)-6-methyl-5,6- dihydropyran-2,4- dione and subsequent carbonyl protection
    • On a kilogram scale, lactone 17 was prepared from methyl-(S)- hydroxybutyrate by conversion to methyl-(S)-3-oxo-5-(tetrahydropy- ran-2-yloxy)hexanoate using methods developed from a published synthesis. Liu, L.; Tanke, R. S.; Miller, M. J. J. Org. Chem. 1986, 51, 5332. followed by acid-catalysed cyclisation to (S)-6-methyl-5,6- dihydropyran-2,4-dione and subsequent carbonyl protection.
    • (1986) J. Org. Chem. , vol.51 , pp. 5332
    • Liu, L.1    Tanke, R.S.2    Miller, M.J.3
  • 40
    • 77149132256 scopus 로고    scopus 로고
    • Prior studies on the racemic version of 23 demonstrated that the yield was compromised by formation of the product of aza-Michael addition of N-methoxymethylamine to the newly formed enone system 29. Investigation into the formation of this impurity demonstrated that it was formed during work-up, and by careful control of temperature and addition rate of the reaction quench this impurity could be minimised to less than 5%. Use of more acidic quench conditions was expected to suppress the formation of the impurity but led to some deprotection
    • Prior studies on the racemic version of 23 demonstrated that the yield was compromised by formation of the product of aza-Michael addition of N-methoxymethylamine to the newly formed enone system 29. Investigation into the formation of this impurity demonstrated that it was formed during work-up, and by careful control of temperature and addition rate of the reaction quench this impurity could be minimised to less than 5%. Use of more acidic quench conditions was expected to suppress the formation of the impurity but led to some deprotection.
  • 43
    • 77149173960 scopus 로고    scopus 로고
    • 3 was found to give slightly better selectivity for pyranone 4 over pyranols 6a/6b, but the rate of reaction was slower
    • 3 was found to give slightly better selectivity for pyranone 4 over pyranols 6a/6b, but the rate of reaction was slower.
  • 53
    • 0033912792 scopus 로고    scopus 로고
    • Previous work in this area has focused on the base-mediated cyclisations of the products from lithio-methoxyallene additions to carbonyls. These have been shown to cyclise to generate furan species; see: and references therein. It was our suspicion that the same type of transformation to form pyran ring systems may occur from allene alcohols derived from epoxide ring opening
    • Previous work in this area has focused on the base-mediated cyclisations of the products from lithio-methoxyallene additions to carbonyls. These have been shown to cyclise to generate furan species; see: Reissig, H.-U.; Hormuth, S.; Schade, W.; Amombo, M. O.; Toshiko, W.; Pulz, R.; Hausherr, A.; Zimmer, R. J. Heterocycl. Chem. 2000, 37, 597, and references therein. It was our suspicion that the same type of transformation to form pyran ring systems may occur from allene alcohols derived from epoxide ring opening.
    • (2000) J. Heterocycl. Chem. , vol.37 , pp. 597
    • Reissig, H.-U.1    Hormuth, S.2    Schade, W.3    Amombo, M.O.4    Toshiko, W.5    Pulz, R.6    Hausherr, A.7    Zimmer, R.8
  • 54
    • 84977283958 scopus 로고
    • This was in contrast, however, to a literature publication which reported formation of furans
    • This was in contrast, however, to a literature publication which reported formation of furans: Hoff, S.; Brandsma, L.; Arens, J. F. Recl. Trav. Chim. PaysBas 1969, 88, 609.
    • (1969) Recl. Trav. Chim. PaysBas , vol.88 , pp. 609
    • Hoff, S.1    Brandsma, L.2    Arens, J.F.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.