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Volumn 11, Issue 2, 2000, Pages 417-421

Efficient conditions for the synthesis of C-glycosylidene derivatives: A direct and stereoselective route to C-glycosyl compounds

Author keywords

[No Author keywords available]

Indexed keywords

GLYCOSIDE; LACTONE; LACTONE DERIVATIVE;

EID: 0034635618     PISSN: 09574166     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0957-4166(99)00586-8     Document Type: Article
Times cited : (50)

References (38)
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    • (b) Trost B. M.; Fleming I., Eds. Pergamon Press: Oxford
    • (b) Bestmann, H. J.; Zimmerman, R. In Comprehensive Organic Synthesis; Trost B. M.; Fleming I., Eds. Synthesis of phosphonium ylides, Vol. 6. Pergamon Press: Oxford, 1991; p. 171;
    • (1991) Synthesis of Phosphonium Ylides , vol.6 , pp. 171
    • Bestmann, H.J.1    Zimmerman, R.2
  • 27
    • 0032497604 scopus 로고    scopus 로고
    • See also Ref. 20.
    • An interesting application of our olefination procedure to aminosugar derived lactones has been reported recently: Molina, A.; Czernecki, S.; Xie, J. Tetrahedron Lett. 1998, 39, 7507-7510. See also Ref. 20.
    • (1998) Tetrahedron Lett. , vol.39 , pp. 7507-7510
    • Molina, A.1    Czernecki, S.2    Xie, J.3
  • 28
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    • See also Ref. 3i.
    • For other approaches to enol ether from lactones see Csuk, R.; Glanzer, B. I. Tetrahedron 1991, 47, 1655-1664. See also Ref. 3i.
    • (1991) Tetrahedron , vol.47 , pp. 1655-1664
    • Csuk, R.1    Glanzer, B.I.2
  • 29
    • 0033588316 scopus 로고    scopus 로고
    • For other approaches to enol ether from thionolactones, see Lee, H. K.; Kim, J.; Pak, C. S. Tetrahedron Lett. 1999, 40, 6267-6270.
    • (1999) Tetrahedron Lett. , vol.40 , pp. 6267-6270
    • Lee, H.K.1    Kim, J.2    Pak, C.S.3
  • 30
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    • Maybe inspired by our work, one example of Wittig olefination of the carbonyl group of oxazolidinone derived from aminoacids in toluene without racemization has been reported: Reddy, G. V.; Rao, G. V.; Iyengar, D. S. Tetrahedron Lett. 1999, 40, 775-776.
    • (1999) Tetrahedron Lett. , vol.40 , pp. 775-776
    • Reddy, G.V.1    Rao, G.V.2    Iyengar, D.S.3
  • 31
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    • Horner Emmons olefination of lactone 2 using cyanomethylene diethyl phosphonate and NaH or potassium t-butoxide, the latter giving best results, yielded 35 to 50% of a E:Z 1:2 mixture of olefins 3.
    • Schiemenz, G. P.; Engelhard, H. Chem. Ber. 1961, 94, 578-584. Horner Emmons olefination of lactone 2 using cyanomethylene diethyl phosphonate and NaH or potassium t-butoxide, the latter giving best results, yielded 35 to 50% of a E:Z 1:2 mixture of olefins 3. For the use of this reagent in the olefination of valerolactone, see Dugan, A. J.; Adams, M. A.; Brynes, P. J.; Meinwald, J. Tetrahedron Lett. 1978, 4323-4326.
    • (1961) Chem. Ber. , vol.94 , pp. 578-584
    • Schiemenz, G.P.1    Engelhard, H.2
  • 32
    • 0002406453 scopus 로고
    • Schiemenz, G. P.; Engelhard, H. Chem. Ber. 1961, 94, 578-584. Horner Emmons olefination of lactone 2 using cyanomethylene diethyl phosphonate and NaH or potassium t-butoxide, the latter giving best results, yielded 35 to 50% of a E:Z 1:2 mixture of olefins 3. For the use of this reagent in the olefination of valerolactone, see Dugan, A. J.; Adams, M. A.; Brynes, P. J.; Meinwald, J. Tetrahedron Lett. 1978, 4323-4326.
    • (1978) Tetrahedron Lett. , pp. 4323-4326
    • Dugan, A.J.1    Adams, M.A.2    Brynes, P.J.3    Meinwald, J.4
  • 33
    • 0342771294 scopus 로고    scopus 로고
    • note
    • Typical procedures for the Wittig reaction are as follows: (a) Using reflux conditions: to a solution of lactone (1 mmol) in 15 ml toluene was added (cyanomethylene) triphenylphosphorane (1.20 g, 4 mmol). The mixture was heated under reflux for the indicated time, concentrated and purified on silica gel; (b) Under microwave activation: the heterogeneous mixture of the substrate (0.5 mmol) in dry toluene (2.5 ml) was placed in a 10 ml Pyrex bottle. The bottle was then hermetically closed with a teflon screw cap (to prevent evaporation of the solvent) and subjected to microwave irradiation in a commercial microwave oven (operating at 2450 MHz) for 2 min. After this heating, a period of 30 s was allowed for cooling and the process was repeated for another 2 min. After removal of the solvent column chromatography gave pure C-glycosylidene compounds.
  • 35
    • 0032890214 scopus 로고    scopus 로고
    • While this work was in progress, successful Wittig olefination of some lactones and hydrazides using microwave activation was reported: Sabitha, G.; Reddy, M. M.; Srinivas, D.; Yadov, J. S. Tetrahedron Lett. 1999, 40, 165-166.
    • (1999) Tetrahedron Lett. , vol.40 , pp. 165-166
    • Sabitha, G.1    Reddy, M.M.2    Srinivas, D.3    Yadov, J.S.4
  • 36
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    • note
    • To a solution of the C-glycosylidene compound (0.5 mmol) in dry MeOH (15 ml) was added 10% palladium on charcoal (80 mg) and the mixture was stirred under hydrogen atmosphere for 16 h at room temperature. The catalyst was filtered off on Celite and the filtrate concentrated. The crude product was purified on silica gel.


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