Strategies towards potent trypanocidal drugs: Application of Rh-catalyzed [2 + 2 + 2] cycloadditions, sulfonyl phthalide annulation and nitroalkene reactions for the synthesis of substituted quinones and their evaluation against Trypanosoma cruzi
作者:James M. Wood、Nishikant S. Satam、Renata G. Almeida、Vinicius S. Cristani、Dênis P. de Lima、Luiza Dantas-Pereira、Kelly Salomão、Rubem F.S. Menna-Barreto、Irishi N.N. Namboothiri、John F. Bower、Eufrânio N. da Silva Júnior
DOI:10.1016/j.bmc.2020.115565
日期:2020.8
Rhodium-catalyzed [2 + 2 + 2] cycloadditions, sulfonyl phthalideannulations and nitroalkene reactions have been employed for the synthesis of 56 quinone-based compounds. These were evaluated against Trypanosoma cruzi, the parasite that causes Chagas disease. The reactions described here are part of a program that aims to utilize modern, versatile and efficient synthetic methods for the one or two
Synthesis of Vitamin K and Related Naphthoquinones via Demethoxycarbonylative Annulations and a Retro-Wittig Rearrangement
作者:Dipakranjan Mal、Ketaki Ghosh、Supriti Jana
DOI:10.1021/acs.orglett.5b02920
日期:2015.12.4
Anionic annulations of 3-nucleofugal phthalides with α-alkyl(aryl)acrylates involving a demethoxycarbonylation provide a succinct synthesis of vitamin K and related naphthoquinones. Also reported is a new cascade reaction stemming from a Cope–retro-Wittig rearrangement. This cascade leads to direct formation of 1-hydroxy-4-prenyloxynaphthalene-2-carboxylates from the corresponding α-prenyl acrylate
The first approach to kinamycin antibiotics: Synthesis of kinafluorenone scaffold
作者:Dipakranjan Mal、Nirmal K. Hazra
DOI:10.1016/0040-4039(96)00349-8
日期:1996.4
Annulation of indenone 5 with phthalide sulfone 6 has been successfully performed to furnish model benzo [b] fluorenone 7, illustrating a potential route to kinamycin antibiotics.
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。