Synthesis and target annotation of the alkaloid GB18.

Synthesis and target annotation of the alkaloid GB18.
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DOI:
10.1038/s41586-022-04840-9
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发表时间:
2022-06
期刊:
影响因子:
64.8
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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银杏树皮中生物碱代谢产物的摄取会对人类产生精神药物和兴奋作用。然而,有限的、可变的GB生物碱供应阻碍了它们的生物探索和临床开发。在这里,我们报告了一种解决GB18供应的方案,GB18是一种结构异常值,也是Galbuimima树皮的假定精神药物原理。要有效地获得其具有挑战性的四面体连接环基序,需要开发配体控制的内选择性交叉凝胶偶联和旋转动力学吡啶的非对映选择性氢化。可靠、克级的GB18使其能够被指定为kappa和mu型阿片受体的有效拮抗剂--这是35年来的第一个新靶点--并为导航和了解Galbuimima代谢物的生物活性奠定了基础。
Ingestion of alkaloid metabolites from the bark of Galbulimima (GB) sp. leads to psychotropic and excitatory effects in humans. Limited, variable supply of GB alkaloids, however, has impeded their biological exploration and clinical development. Here we report a solution to the supply of GB18, a structural outlier and putative psychotropic principle of Galbulimima bark. Efficient access to its challenging tetrahedral attached-ring motif required the development of a ligand-controlled endo-selective cross-electrophile coupling and a diastereoselective hydrogenation of a rotationally-dynamic pyridine. Reliable, gram-scale access to GB18 allowed its assignment as a potent antagonist of kappa- and mu- opioid receptors—the first new targets in 35 years—and lay the foundation to navigate and understand the biological activity of Galbulimima metabolites.
DOI: 10.1126/science.abn8343
发表时间: 2022-03-18
期刊: Science (New York, N.Y.)
影响因子: --
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