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Roxbin B is cuspinin: Structural revision and total synthesis

机译:Roxbin B是cuspinin:结构修饰和总合成

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Prompted by the outcome that the synthesized roxbin B was not identical to the natural roxbin B, the structural determination process and spectral data were re-examined, with the finding that roxbin B was very likely to be 1-O-galloyl-2,3-(R);4,6-(S)-bis-O-hexahydroxydiphenoyl-β-d-glucose (cuspinin). Because the (R)-axial chirality is rare in natural products when the hexahydroxydiphenoyl group bridges the 2- and 3-oxygens, the proposed structure of cuspinin was confirmed by the total synthesis, leading to the conclusion that roxbin B is the same as cuspinin.
机译:结果提示合成的roxbin B与天然roxbin B不同,因此重新检查了结构测定过程和光谱数据,发现roxbin B很可能是1-O-galloyl-2,3 -(R); 4,6-(S)-双-O-六羟基二苯甲酰基-β-d-葡萄糖(cuspinin)。由于当六羟基二苯甲酰基桥接2和3个氧时,(R)轴向手性在天然产物中很少见,因此通过全合成证实了cuspinin的拟议结构,从而得出了roxbin B与cuspinin相同的结论。 。

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