Efficient synthesis of glycosylated phenazine natural products and analogs with DISAL (methyl 3,5-dinitrosalicylate) glycosyl donors
作者:Jane B. Laursen、Lars Petersen、Knud J. Jensen、John Nielsen
DOI:10.1039/b306789k
日期:——
Inspired by the occurrence and function of phenazines in natural products, new glycosylated analogs were designed and synthesized. DISAL (methyl 3,5-dinitrosalicylate) glycosyl donors were used in an efficient and easily-handled glycosylation protocol compatible with combinatorial chemistry. Benzoylated D-glucose, D-galactose and L-quinovose DISAL glycosyl donors were synthesized in high yields and used under mild conditions to glycosylate methyl saphenate and 2-hydroxyphenazine. The glycosides were screened for biological activity and one compound showed inhibitory activity towards topoisomerase II.
受天然产物中吩嗪的存在和功能的启发,设计并合成了新的糖基化类似物。 DISAL(3,5-二硝基水杨酸甲酯)糖基供体用于与组合化学兼容的高效且易于处理的糖基化方案。以高产率合成了苯甲酰化的 D-葡萄糖、D-半乳糖和 L-奎诺糖 DISAL 糖基供体,并在温和条件下用于糖基化山酚酸甲酯和 2-羟基吩嗪。对糖苷的生物活性进行了筛选,其中一种化合物显示出对拓扑异构酶 II 的抑制活性。