Results 61 to 70 of about 2,659 (180)

Alkyl Arylacetates in Cascade Reactions with 2‐Cyanobenzaldehydes for the Synthesis of 3‐Substituted Isoindolinones

European Journal of Organic Chemistry, Volume 29, Issue 24, 23 June 2026.
Effective synthesis of 3‐substituted isoindolinones is possible through novel cascade reactions of alkyl arylacetates with 2‐cyanobenzaldehydes under mild, basic conditions. Herein we report the use of alkyl arylacetates as pro‐nucleophiles in cascade reactions with 2‐cyanobenzaldehydes leading to the formation of novel 3‐substituted isoindolinones, a ...
Antonia Di Mola, Prabaharan Thiruvengetam, Alessandra Forlenza, Armin R. Ofial, Antonio Massa   +4 more
wiley   +1 more source

Convenient Replacement of the Hydroxy by an Amino Group in 4 Hydroxycoumarin and 4-Hydroxy-6-methyl-2-pyrone under Microwave Irradiation

Molecules, 2004
The reaction of 4-hydroxycoumarin (1) with some primary amines 2a-h and morpholine (2i) under microwave irradiation occurred without opening of the lactone ring to give N-substituted 4-aminocoumarins 3a-i in excellent yields.
Ivo C. Ivanov, Edmont V. Stoyanov
doaj   +1 more source

Aromatic Polyketides from a Symbiotic Strain Aspergillus fumigatus D and Characterization of Their Biosynthetic Gene D8.t287

Marine Drugs, 2020
The chemical investigation of one symbiotic strain, Aspergillus fumigatus D, from the coastal plant Edgeworthia chrysantha Lindl led to the isolation of eight compounds (1–8), which were respectively identified as rubrofusarin B (1), alternariol 9-O ...
Yi Hua, Rui Pan, Xuelian Bai, Bin Wei, Jianwei Chen, Hong Wang, Huawei Zhang   +6 more
doaj   +1 more source

Main Ustilaginoidins and Their Distribution in Rice False Smut Balls

Toxins, 2015
Rice false smut has become an increasingly serious fungal disease in rice (Oryza sativa L.) production worldwide. Ustilaginoidins are bis-naphtho-γ-pyrone mycotoxins previously isolated from the rice false smut balls (FSBs) infected by the pathogen ...
Jiajia Meng, Weibo Sun, Ziling Mao, Dan Xu, Xiaohan Wang, Shiqiong Lu, Daowan Lai, Yang Liu, Ligang Zhou, Guozhen Zhang   +9 more
doaj   +1 more source

Production of New Antibacterial 4-Hydroxy-α-Pyrones by a Marine Fungus Aspergillus niger Cultivated in Solid Medium

Marine Drugs, 2019
Four 4-hydroxy-α-pyrones including three new ones named nipyrones A−C (1−3) together with one known analogue germicidin C (4) were discovered from a marine sponge-derived fungus Aspergillus niger cultivated in a solid rice culture. Their
Lijian Ding, Lu Ren, Shuang Li, Jingjing Song, Zhiwen Han, Shan He, Shihai Xu   +6 more
doaj   +1 more source

Diastereo- and Enantioselective Inverse-Electron-Demand Diels-Alder Cycloaddition between 2-Pyrones and Acyclic Enol Ethers. [PDF]

Angew Chem Int Ed Engl, 2022
Huang G, Guillot R, Kouklovsky C, Maryasin B, de la Torre A.   +4 more
europepmc   +1 more source

Alkynyl triazenes enable divergent syntheses of 2-pyrones. [PDF]

Chem Sci, 2021
Tan JF, Bormann CT, Severin K, Cramer N.
europepmc   +1 more source

A formal [3 + 3] cycloaddition of allenyl imide and activated ketones for the synthesis of tetrasubstituted 2-pyrones. [PDF]

RSC Adv, 2021
Wang YH, Zhang DH, Cao ZH, Li WL, Huang YY.   +4 more
europepmc   +1 more source

Determination of the Inhibitory and Pharmacokinetic Properties of Helipyrone, Norhelipyrone, Italipyrone, Bisnorhelipyrone, and Plicatipyrone by in Silico Methods [PDF]

Brazilian Archives of Biology and Technology
Helichrysum stoechas (L.), commonly known as the eternal flower, has long been used in traditional medicine for the treatment of many diseases. Previous phytochemical studies have reported that H.
Yunus Başar
doaj   +2 more sources

Chemical Profile, Radical Scavenging and Cytotoxic Activity of Yellow Gentian Leaves ) Grown in Northern Regions of Montenegro

Natural Product Communications, 2012
LC-ESI-MS and HPLC were used for the identification of the constituents from G. lutea leaves collected at different localities, as well as for quantification of the main compounds.
Jasmina Balijagić, Teodora Janković, Gordana Zdunić, Jelena Bošković, Katarina Šavikin, Dejan Goćevac, Tatjana Stanojković, Miodrag Jovančević, Nebojša Menković   +8 more
doaj   +1 more source