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本文以全乙酰溴代糖为糖基供体,应用相转移催化法进行糖苷化合成了7-O-b-D-喹诺糖基diphyllin苷(patentiflorin A)和7-O-b-L-岩藻糖基diphyllin苷(patentiflorin B)两种糖苷,然后将patentiflorin B糖环的3’和 4’位羟基进行原酸酯化和酸催化重排反应,得到了天然产物4’-O-乙酰7-O-b-L-岩藻糖基diphyllin苷。三个目标化合物的氢谱、碳谱和高分辨质谱数据与文献报道的天然产物一致。 相似文献
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First Synthesis of Bioactive Diphyllin Glycosides Isolated from Justicia patentiflor Hemsl 总被引:2,自引:0,他引:2
The syntheses of three naturally occurring diphyllin glycosides have been achieved. 7-O-β-D-Qtfmovopyranosyldiphyllin (patentiflorin A) and 7-O-β-L-fucopyranosyldiphyllin (patentiflorin B) were synthesized by the glycosylation of diphyllin with peracetylglycosyl bromides under phase transfer catalysis (PTC) conditions. 4"-O-Acetyl-7-O-β-L-fucopyranosyldiphyllin (4"-O-acetyl patentiflorin B) was obtained from patentiflorin B on an orthoesterification-orthoester rearrangement approach. Their ^1H NMR, ^13C NMR and HRMS signals are all consistent with those reported for the natural product. 相似文献
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