Naphthoquinone-based chalcone hybrids and derivatives: synthesis and potent activity against cancer cell lines
作者:Guilherme A. M. Jardim、Tiago T. Guimarães、Maria do Carmo F. R. Pinto、Bruno C. Cavalcanti、Kaio M. de Farias、Claudia Pessoa、Claudia C. Gatto、Divya K. Nair、Irishi N. N. Namboothiri、Eufrânio N. da Silva Júnior
DOI:10.1039/c4md00371c
日期:——
Naphthoquinone-based chalcone hybrids were synthesized and evaluated for their cytotoxic activity against four cancer cell lines and PBMC. Some of the hybrids exhibited promising anticancer activity with IC50 values < 1 μM.
Asymmetricα,γ-regioselective [3 + 3] formal cycloadditions of α,β-unsaturatedaldehydes and 2-nitroallylic acetates have been developed for the first time. These reactions proceeded through a domino Michael addition–Michael addition sequence via an unusual cascade dienamine–dienamine catalysis of a chiral secondary amine, and multifunctional cyclohexene derivatives were generally constructed in moderate
首次开发了α,β-不饱和醛与2-硝基烯丙基乙酸酯的不对称α,γ-区域选择性[3 + 3]形式环加成。这些反应通过手性仲胺的不同寻常的级联二烯胺-二烯胺催化,通过多米诺骨牌迈克尔加成-迈克尔加成序列进行,在简单地用K 2 CO 3处理后,通常以中等收率构建具有优良立体选择性的多功能环己烯衍生物。
Stereocontrolled Construction of Tetrahydropyrano[2,3-<i>c</i>]pyrazole Scaffold via an Organocatalyzed Formal [3 + 3] Annulation
作者:Yin Zheng、Lei Cui、Youming Wang、Zhenghong Zhou
DOI:10.1021/acs.joc.6b00196
日期:2016.5.20
enantioselective formal [3 + 3] annulation reaction with pyrazolin-5-ones and nitroallylic acetates has been developed. Densely substituted tetrahydropyrano[2,3-c]pyrazoles with two adjacent stereogenic centers are obtained in a highly stereocontrolled manner. Representative transformation of the annulation product to a biologically important fused dihydroisoquinoline is achieved without any appreciable loss
已经开发了双功能方酰胺与吡唑啉-5-酮和硝基烯丙基乙酸盐催化的对映选择性形式[3 + 3]环化反应。具有两个相邻的立体中心的密集取代的四氢吡喃并[2,3- c ]吡唑以高度立体可控的方式获得。在非对映体和对映体选择性没有任何明显损失的情况下,实现了将环化产物代表性地转化为生物学上重要的稠合二氢异喹啉。
Synthesis of tetrahydrothiopyrano[2,3-<i>b</i>]indoles <i>via</i> [3+3] annulation of nitroallylic acetates with indoline-2-thiones
作者:Pallabita Basu、Chiranjit Hazra、Thekke V. Baiju、Irishi N. N. Namboothiri
DOI:10.1039/c9nj04754a
日期:——
and stereoselective synthesis of thiopyran annulated indoles. It involves a base mediated cascade [3+3] annulation of indoline-2-thiones and nitroallylic acetates. The tetrahydrothiopyranoindoles which were formed in good yields and in a short reaction time could be easily transformed to triazole derivatives by taking advantage of the nitro group present in the skeleton.
[3+2]-Annulation of oxindolinyl-malononitriles with Morita–Baylis–Hillman acetates of nitroalkenes for the regio- and diastereoselective synthesis of spirocyclopentane-indolinones
作者:Abhishek Pareek、Sudheesh T. Sivanandan、Shweta Bhagat、Irishi N.N. Namboothiri
DOI:10.1016/j.tet.2022.132650
日期:2022.2
highly regio- and stereoselective [3 + 2] annulation with 1,3-bielectrophilic nitroallylic acetates leading to spirocyclopentane-indolinones. The reaction takes place in the presence of DABCO in THF at room temperature and affords the multi-functional spirocyclic compounds possessing three chiral centers, including a spiro-chiral center in good to excellent yields and short reaction time. The key role