Isosyringinoside (1) and 3-(O-β-d-glucopyranosyl)-α-(O-β-d-glucopyranosyl)-4-hydroxy phenylethanol (2), the natural bioactive compounds contained unique structures, were first totally synthesized using easily available materials in short convenient routes with overall yields of 20.2% and 27.0%, respectively. An efficient total synthesis of 1 was developed in six steps, which contained two key steps of highly regioselective glycosylation without any selective protection steps. The seven-step synthesis of 2 involved two steps of regioselective glycosylations using BF3-O(C2H5)2 and TMSOTf as catalysts, respectively.
Keywords: 3-(O-β-(d)-glucopyranosyl)-α-(O-β-(d)-glucopyranosyl)-4-hydroxy phenylethanol; Glycosides; Isosyringinoside; Total synthesis.
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