certain cases, the corresponding 2-amidonaphthoquinones are directly formed. The reaction of 3-nucleofugal phthalides with 2-amidoacrylates is shown to provide a synthesis of densely substituted naphth[2,1-d]oxazoles in good yields. It is proposed to proceed via a five-step cascade which includes phthalideannulation, demethoxycarbonylation, and heterocyclization. The methodology is free from regiochemical
◊这些作者为这项工作做出了同等贡献。 抽象的 显示3-核真菌邻苯二甲酸酯与2-氨基丙烯酸酯的反应以良好的产率提供了稠密取代的萘[2,1- d ]恶唑的合成。提议通过包括邻苯二甲酸酯环化,脱甲氧基羰基化和杂环化的五步级联进行。该方法没有产品的区域化学歧义性。在某些情况下,直接形成相应的2-ami基萘醌。 显示3-核真菌邻苯二甲酸酯与2-氨基丙烯酸酯的反应以良好的产率提供了稠密取代的萘[2,1- d ]恶唑的合成。提议通过包括邻苯二甲酸酯环化,脱甲氧基羰基化和杂环化的五步级联进行。该方法没有产品的区域化学歧义性。在某些情况下,直接形成相应的2-ami基萘醌。
Anionic Annulation of 3-Cyanophthalides with Allene Carboxylates: A Carbon-Conserved Synthesis of Naphtho[<i>b</i>]furanones
作者:Supriti Jana、Dipakranjan Mal
DOI:10.1021/acs.joc.8b00272
日期:2018.4.20
The reaction of 3-cyanophthalides with allene carboxylates in the presence of tBuOLi results in a tandem annulation furnishing naphtho[b]furanones in good yields with no loss of carbon. The carbon economy is explained by a tandem process, in which the initially expelled cyanide induces the second annulation.
在t BuOLi的存在下3-氰基邻苯二甲酸酯与羧酸烯丙酯的反应导致串联环化提供了萘[ b ]呋喃酮,收率很好,并且没有碳的损失。碳经济通过串联过程来解释,其中最初排出的氰化物引起第二次成环。
Regioselective synthesis of naphthoquinone/naphthoquinol–carbohydrate hybrids by [4 + 2] anionic annulations and studies on their cytotoxicity
作者:Soumen Chakraborty、Gaurav Das、Surajit Ghosh、Dipakranjan Mal
DOI:10.1039/c6ob02154a
日期:——
A novel approach for the synthesis of naphthoquinone/naphthoquinol–carbohydrate hybrids using the Hauser annulation as the key synthetic step has been described.
Applications of [4+2] Anionic Annulation and Carbonyl-Ene Reaction in the Synthesis of Anthraquinones, Tetrahydroanthraquinones, and Pyranonaphthoquinones
作者:Shyam Basak、Dipakranjan Mal
DOI:10.1021/acs.joc.7b01987
日期:2017.10.20
5-dienoates, susceptible to isomerization by acids and bases, are suitable for the [4+2] anionic annulation to give 3-(2-alkenyl)naphthoates in regiospecific manner. When combined with intramolecular carbonyl-enereaction (ICE), the accessibility of the naphthoates culminates in a new synthesis of anthraquinones and diastereoselective synthesis of tetrahydroanthraquinones. This strategy has also resulted in a
Indolyl-chalcone derivatives induce hepatocellular carcinoma cells apoptosis through oxidative stress related mitochondrial pathway in vitro and in vivo
作者:Xinrui Zhang、Mengya Wang、Shanshan Teng、Di Wang、Xin Li、Xiaofeng Wang、Weiwei Liao、Di Wang
DOI:10.1016/j.cbi.2018.07.025
日期:2018.9
tumor growth without affecting the animals' bodyweight or organ functions. Proteome profiling of tumor tissues after 24-h exposure to 5h2c showed significantly enhanced expression levels of Bcl-2 associated X protein, cleaved caspase −3, −8, and −9, nuclear factor erythroid 2-related factor 2 (Nrf2), heme oxygenase-1 (HO-1), heme oxygenase-2, paraoxonase 2, catalase, and factor associated suicide ligand