乙酸酐 、 Ningalin D 在
吡啶 作用下,
反应 3.0h,
以98%的产率得到ningalin D decaacetate
参考文献:
名称:
宁格林D的全合成
摘要:
公开了一种简洁(九步)且有效(19% 总产率)的宁加林 D (1a) 全合成方法,该合成基于关键的 1,2,4,5-四嗪 --> 1,2-二嗪 -- > 吡咯 Diels-Alder 策略,用于组装其结构中心的完全取代的吡咯核。合成的其他亮点包括双 Dieckmann 缩合以引入 C 和 D 芳基环,这些取代基被明智地放置在亲二烯体上并且是广泛使用的四嗪 2 所固有的,所得 C 和 D 苯酚三氟甲磺酸酯的高效铃木偶联,用于引入空间要求高的 F 和 G 芳环,以及由 Curtius 重排引发的异常有效的正式氧化脱羧反应级联,以直接提供嵌入在 ningalin D 结构中的联苯醌甲基化物。
公开了一种简洁(九步)且有效(19% 总产率)的宁加林 D (1a) 全合成方法,该合成基于关键的 1,2,4,5-四嗪 --> 1,2-二嗪 -- > 吡咯 Diels-Alder 策略,用于组装其结构中心的完全取代的吡咯核。合成的其他亮点包括双 Dieckmann 缩合以引入 C 和 D 芳基环,这些取代基被明智地放置在亲二烯体上并且是广泛使用的四嗪 2 所固有的,所得 C 和 D 苯酚三氟甲磺酸酯的高效铃木偶联,用于引入空间要求高的 F 和 G 芳环,以及由 Curtius 重排引发的异常有效的正式氧化脱羧反应级联,以直接提供嵌入在 ningalin D 结构中的联苯醌甲基化物。
作者:Jang-Yeop Kim、Dong-Hyun Kim、Tae-Hong Jeon、Woo-Hyung Kim、Cheon-Gyu Cho
DOI:10.1021/acs.orglett.7b02372
日期:2017.9.1
A flexible synthetic strategy for the totalsyntheses of ningalins D and G is described. The highly effective TMS-OTf/2,6-lutidine-mediated [3,3]-sigmatropic rearrangement of densely loaded dinaphthyl hydrazides and cyclization of the resulting 2,2′-diamino-1,1′-dinaphthyls afforded the key 7H-dibenzo[c,g]carbazole intermediates. Successful conversions to biphenylene quinone methides followed by regioselective
Treatment of viral infections by modulation of host cell metabolic pathways
申请人:THE TRUSTEES OF PRINCETON UNIVERSITY
公开号:EP2581081A2
公开(公告)日:2013-04-17
Alterations of certain metabolite concentrations and fluxes that occur in response to viral infection are described. Host cell enzymes in the involved metabolic pathways are selected as targets for intervention; i.e., to restore metabolic flux to disadvantage viral replication, or to further derange metabolic flux resulting in "suicide" of viral-infected cells (but not uninfected cells) in order to limit viral propagation. While any of the enzymes in the relevant metabolic pathway can be selected, pivotal enzymes at key control points in these metabolic pathways are preferred as candidate antiviral drug targets. Inhibitors of these enzymes are used to reverse, or redirect, the effects of the viral infection. Drug candidates are tested for antiviral activity using screening assays in vitro and host cells, as well as in animal models.; Animal models are then used to test efficacy of candidate compounds in preventing and treating viral infections. The antiviral activity of enzyme inhibitors is demonstrated.
TREATMENT OF VIRAL INFECTIONS BY MODULATION OF HOST CELL METABOLIC PATHWAYS
申请人:The Trustees of Princeton University
公开号:US20160346309A1
公开(公告)日:2016-12-01
Alterations of certain metabolite concentrations and fluxes that occur in response to viral infection are described. Host cell enzymes in the involved metabolic pathways are selected as targets for intervention; i.e., to restore metabolic flux to disadvantage viral replication, or to further derange metabolic flux resulting in “suicide” of viral-infected cells (but not uninfected cells) in order to limit viral propagation. While any of the enzymes in the relevant metabolic pathway can be selected, pivotal enzymes at key control points in these metabolic pathways are preferred as candidate antiviral drug targets. Inhibitors of these enzymes are used to reverse, or redirect, the effects of the viral infection. Drug candidates are tested for antiviral activity using screening assays in vitro and host cells, as well as in animal models. Animal models are then used to test efficacy of candidate compounds in preventing and treating viral infections. The antiviral activity of enzyme inhibitors is demonstrated.