Access to 6-hydroxy indolizines and related imidazo[1,5-<i>a</i>]pyridines through the S<sub>N</sub>2 substitution/condensation/tautomerization cascade process
作者:Guiyun Duan、Hao Liu、Liqing Zhang、Chunhao Yuan、Yongchao Li、Yanqing Ge
DOI:10.1039/d1ra04425g
日期:——
A simple and efficient cascade reaction was developed for the construction of hydroxy substituted indolizines from pyrrole-2-carbaldehydes and commercially available 4-halogenated acetoacetic esters. Their optical properties were also evaluated.
Disclosed are compounds represented by the following chemical formula (I) and pharmacologically acceptable salts thereof which are novel compounds useful as anticancer agents, antiviral agents or antimicrobial agents. ##STR1##
Chemotherapeutische Nitroheterocyclen, 17. Mitt.: Kondensationsprodukte von nitrierten heterocyclischen Aldehyden mit Oxo-cyclopentathiophenen und Oxo-tetrahydrochinolinen
作者:R. Albrecht、E. Schröder
DOI:10.1002/ardp.19753080803
日期:——
Es werden die Kondensationsprodukte 7–22 aus 5‐Nitro‐furfural, 5‐Nitro‐thiophen‐2‐aldehyd, 5‐Nitro‐pyrrol‐2‐aldehyd oder 1‐Methyl‐5‐nitro‐imidazol‐2‐aldehyd und einem Oxo‐cyclopentathiophen oder Oxo‐tetrahydrochinolin hergestellt. Die Verbindungen sind in vitro wirksam gegen Trichomonas vaginalis.
Microwave-assisted synthesis and evaluation of antimicrobial activity of 3-{3-(s-aryl and s-heteroaromatic)acryloyl}-2<i>H</i>-chromen-2-one derivatives
作者:Olayinka O. Ajani、Obinna C. Nwinyi
DOI:10.1002/jhet.298
日期:——
analytical and spectral data. All the synthesized compounds were screened for their antibacterial activity and 3-3-(4-dimethylaminophenyl)acryloyl}-2H-chromen-2-one () was discovered to be the most active at minimum inhibitory concentration (MIC) value of 7.8 μg/mL. J. Heterocyclic Chem., (2010).
Nucleophilic heteroaromatic substitution. Derivatives of pyrrolo-[2,1-b]oxazole
作者:V. Vecchietti、E. Dradi、F. Lauria
DOI:10.1039/j39710002554
日期:——
Spectroscopic evidence is utilized in elucidating the structure of 5-acyl-2,3-dihydropyrrolo[2,1-b]oxazoles obtained by intramolecular cyclization of 2-acyl-1-(2-hydroxyethyl)-5-nitropyrroles. Evidence is presented which indicates that the reaction follows an SN path.
利用光谱学证据阐明了通过2-酰基-1-(2-羟乙基)-5-硝基吡咯的分子内环化获得的5-酰基-2,3-二氢吡咯并[ 2,1- b ]恶唑的结构。提供的证据表明反应遵循S N路径。