Base-controlled selective construction of polysubstituted dihydrofuran and furan derivatives through an I2-mediated cyclization
摘要:
A base-controlled formal [3 + 2] cycloaddition of 1,3-dicarbonyl compounds to enones via an I-2-mediated cyclization was reported. Highly functionalized dihydrofurans and furans were selectively obtained under I-2/DMAP and I-2/DBU conditions in the cyclization step, respectively. (C) 2016 Elsevier Ltd. All rights reserved.
Synthesis and Pharmacological Investigations of Some 4-Hydroxycoumarin Derivatives
作者:Ilia Manolov、Nicolay D. Danchev
DOI:10.1002/ardp.200390010
日期:2003.4
The synthesis of ten coumarin derivatives of 4‐hydroxycoumarin and various unsaturated ketones and aldehydes is described. The structures of the synthesized compounds were confirmed by IR, 1H‐NMR, and mass‐spectral data. Acute toxicity studies of the compounds were performed on mice by oral and intraperitoneal administration. A comparative pharmacological study of the in vivo anticoagulant effects
A simple and atom-economic synthesis of highly substituted thiophenes is demonstrated. Heating a solution of a chalcone and a linear/cyclic 1,3-dicarbonyl compound with elemental sulfur in CH3CN in the presence of NEt3 at 80 °C afforded the corresponding substituted thiophenes in good to excellent yields.
Base-controlled selective construction of polysubstituted dihydrofuran and furan derivatives through an I2-mediated cyclization
作者:Chun-Bao Miao、Rui Liu、Yan-Fang Sun、Xiao-Qiang Sun、Hai-Tao Yang
DOI:10.1016/j.tetlet.2016.12.078
日期:2017.2
A base-controlled formal [3 + 2] cycloaddition of 1,3-dicarbonyl compounds to enones via an I-2-mediated cyclization was reported. Highly functionalized dihydrofurans and furans were selectively obtained under I-2/DMAP and I-2/DBU conditions in the cyclization step, respectively. (C) 2016 Elsevier Ltd. All rights reserved.