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Bragantia

Print version ISSN 0006-8705On-line version ISSN 1678-4499

Bragantia vol.42 no.1 Campinas  1983

http://dx.doi.org/10.1590/S0006-87051983000100025 

NOTA

 

Extração e isolamento de a-solanina de brotos de batata

 

Extraction and isolation of a-solanine from potato sprouts

 

 

Dayse Soave Spoladore; Marco Antonio Teixeira Zullo*; João Paulo Feijão Teixeira*

Seção de Fitoquímica, Instituto Agronômico, IAC

 

 


SUMMARY

Fresh potato sprouts were extracted with 2% aqueous acetic acid for 48 hours. The crude alkaloidal extract was purified by repeating the operation. Precipitation by concentrated ammonium hydroxide, centrifugation, dissolution of the resulting precipitate in 2% acetic acid, till a clear alkaline supernatant was obtained. The a-solanine, obtained by this procedure was purified by successive recristalizations with ethyl alcohol. The total yield was about 0.02% of the fresh material, with purity greater than 99%. IR, 1H and 13C NMR spectra are shown.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

REFERÊNCIAS BIBLIOGRÁFICAS

1. BURTON, W. G. Requirements of users of ware potatoes. Potato Research,17:374-409, 1974        [ Links ]

2. KUHN R. & LÖW, I. Über Demissin, ein Alkaloidglycoside aus den Blättern von Solanum demissum. Chemische Berichte, 80:406-410, 1947.        [ Links ]

3. __________; __________; TRISCHMANN, H. Die Konstitution des Solanines.Chemische Berichte, 88:1492-1507, 1955.        [ Links ]

4. NEHER, R. Amnisteroids, Steroid Alkaloids and Glycosides. In: STAHL, E.Thin-Layer Chromatography. 2.ed. Springer Verlag, 1962. p.348-349.        [ Links ]

5. PORTER, W. M. A Note on the Melting Point of a-Solanine. American Potato Journal, 49:403-407, 1972.        [ Links ]

6. PRELOG, V. & JEGER, O. Chemistry of Solatium and Veratrum Alkaloids. In: MANSKE, R. H. F. & HOLMES, H. L., eds. The Alkaloids. New York, Academic Press, 1953. v.3, p.247-312.        [ Links ]

7. RADEGLIA, R.; ADAM, G.; RIPPERGER, H. 13CNMR Spectroscopy of Solatium Steroid Alkaloids. Tetrahedron Letters, 11:903-906, 1977.        [ Links ]

8. SHARP, T. M. Alkaloids of the Potato, Etc. In: MITCHELL, C. A., ed. Allen's Commercial Organic Analysis. 5ed. London, J. & A. Churchill, Ltd., 1929. v.VII, p.189-197.        [ Links ]

9. SCHREIBER, K. Die Glykoalkaloid der Solanaceen. Chemische Technik, 6:648-657, 1954.        [ Links ]

10. SPOLADORE, D. S.; TEIXEIRA, J. P. F.; ZULLO, M. A. T.; TEIXEIRA, P. R. M.; COELHO, S. M. B. M.; MIRANDA FILHO, H. S. Ocorrência de glicoalcalóides e esverdeamento em tubérculos de batata recém-colhidos e armazenados. Bragantia, Campinas, 42:221-230, 1983.        [ Links ]

11. WESTON, J.; GOTTLIEB, H. E.; HAGOMON, E. W.; WENKERT, E. Carbon -13 Nuclear Magnetic Resonance of Naturally Occurring Substances. LI. Solanum Glycoalkaloids. Australian Journal Chemistry, 30:917-921, 1977.        [ Links ]

12. ZEMPLÉM, G. & GERÉCS, A. Beiträge zur Konstitution des Solanines. Berichte der Deustchen Chemischen Gesellschaft, 61:2294-2300, 1982.        [ Links ]

 

 

Recebida para publicação a 1 de abril de 1982.

 

 

* Com bolsa de suplementação do CNPq.

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