茶の成分に關する研究 : (第5報) Theanineの合成
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Previously, one of the authors discovered a new amide in the water extract of Japanese green tea and named it theanine which was assumed to be L-glutamic acid γ-ethyl amide. Now we attempted to synthesize it according to the following scheme. L-Glutamic acid→L-glutamic acid γ-ethyl ester →N-cbz-L-glutamic acid γ-ethyl ester →N-cbz-L-glutamic acid γ-ethyl amide →L-glutamic acid γ-ethyl amide. L-Glutamic acid γ-ethyl amide obtained here had m. p. 217_??_218° (decompose) and [α]20D=+7.0. The mixture with natural theanine (m. p. 217°) showed no depression of its m. p. Their Cusalts were also completely identical. Therefore, it is provedd that natural theanine is L-glutamic acid γ-ethyl amide itself.
- 社団法人 日本農芸化学会の論文
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関連論文
- 茶の成分に關する研究 : (第5報) Theanineの合成
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- 茶のアミノ酸に関する研究-1-
- 茶のアミノ酸に関する研究(2)-Theanine近縁化合物の合成