Extração e isolamento de alfa-solanina de brotos de batata

Extraction and isolation of alpha-solanine from potato sprouts

Resumo

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 alpha-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.

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.

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Recebida para publicação a 1 de abril de 1982.

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*

Com bolsa de suplementação do CNPq.

Datas de Publicação

• Publicação nesta coleção
  17 Dez 2007
• Data do Fascículo
  1983

Histórico

• Recebido
  01 Abr 1982