Concise Total Syntheses of the 6-7-5 Hamigeran Natural Products.
Concise Total Syntheses of the 6-7-5 Hamigeran Natural Products.
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DOI:
10.1021/jacs.3c06031
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发表时间:
2023-08-30
影响因子:
15
通讯作者:
Dai, Mingji
中科院分区:
文献类型:
--
作者:
Jiang, Baiyang;Dai, Mingji
Herein, we report the total syntheses of four hamigeran natural products featuring a 6–7–5 tricyclic carbon skeleton. We utilized a palladium-catalyzed intramolecular cyclopropanol ring opening cross-coupling to build the central seven-membered ring and a series of oxidations including a challenging aromatic C–H oxidation to introduce the peripheral functionalities. This approach enabled us to achieve the first total syntheses of hamigeran C (14 steps), debromohamigeran I (12 steps), and hamigeran I (13 steps). Our synthesis also resulted in hamigeran G in 13 steps, which is significantly shorter than the previously reported one (24 steps, longest linear sequence).
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