490-78-8Relevant articles and documents
(1,5)-Acetyl Shifts in Cycloadducts derived from 2-Acetyl-1,4-benzoquinones
Cooper, Simon C.,Sammes, Peter G.
, p. 633 - 634 (1980)
(1,5)-Acetyl shifts have been investigated in a number of cycloadducts prepared from 2-acetyl-1,4-benzoquinone and dienes, and it has been shown that the direction of migration depends on the nature of the diene substituents.
A chromone derivative as a colorimetric and “ON-OFF-ON” fluorescent probe for highly sensitive and selective detection of Cu2+ and S2?
Liu, Cong,Tian, Limei,Liu, Kui,Xue, Jia,Fan, Long,Li, Tianrong,Yang, Zheng-yin
, (2021/02/21)
A chromone derivative (L) which could be utilized for reversibly detecting Cu2+ and S2? by means of fluorescence quenching and displacement in aqueous solution was designed and developed. Upon the addition of Cu2+, the strong blue-green fluorescence emission of L was quenched rapidly and then recovered in 1 min by successively adding S2?. Furthermore, with the alternate addition of Cu2+ and S2?, the reversible cycles could be repeated for at least four times, which meant that L could be identified as a renewable dual-functioning probe. What's more, due to its excellent sensing performances, this probe L could also be used to detect Cu2+ and S2? with test strips conveniently.
Synthesis and evaluation of trypanocidal activity of chromane-type compounds and acetophenones
Escobar, Gustavo,González, Luis A.,Qui?ones, Wiston,Robledo, Sara,Upegui, Yulieth
, (2021/12/02)
American trypanosomiasis (Chagas disease) caused by the Trypanosoma cruzi parasite, is a severe health problem in different regions of Latin America and is currently reported to be spreading to Europe, North America, Japan, and Australia, due to the migration of populations from South and Central America. At present, there is no vaccine available and chemotherapeutic options are reduced to nifurtimox and benznidazole. Therefore, the discovery of new molecules is urgently needed to initiate the drug development process. Some acetophenones and chalcones, as well as chromane-type substances, such as chromones and flavones, are natural products that have been studied as trypanocides, but the relationships between structure and activity are not yet fully understood. In this work, 26 compounds were synthesized to determine the effect of hydroxyl and isoprenyl substituents on trypanocide activity. One of the compounds showed interesting activity against a resistant strain of T. cruzi, with a half effective concentration of 18.3 μM ± 1.1 and an index of selectivity > 10.9.