Improved preparation of vitexin from hot water extract of Basella alba, the commercially available vegetable Malabar spinach (“Tsurumurasaki” in Japanese) and the application to semisynthesis of chafuroside B

Figures & data

Figure 1. Structures of C-glycosylated flavones, such as chafurosides A and B (1a) and vitexins (2ab).

Scheme 1. So-far reported the chemical synthesis of chafuroside B (1a) [5] via vitexin (2b) [5,6] as the key precursor.

Scheme 2. Semisynthesis of chafuroside B (1a) via vitexin (2b), from hot water extract of Basella alba leaves.

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