Synthesis of Multi-Functionalized Chromeno[2,3-c]pyrrol-9(2H)-ones: Investigation and Application of Baker-Venkataraman Rearrangement Involved Reactions Catalyzed by 4-(Dimethylamino)pyridine
作者:Yanjun Yu、Yun Hu、Weiyan Shao、Jianing Huang、Yinglin Zuo、Yingpeng Huo、Linkun An、Jun Du、Xianzhang Bu
DOI:10.1002/ejoc.201100435
日期:2011.8
An efficient one-potsynthesis of multi-functionalized chromeno[2,3-c]pyrrol-9(2H)-onesfrom 1,3-diaryl-1,3-diketones and amino acids is described. The synthesis is based on the 4-(dimethylamino)pyridine-catalyzed Baker–Venkataraman rearrangement and subsequent reactions.
One-pot synthesis of 3-(furan-2-yl)-4H-chromen-4-ones from 1-(2-hydroxyphenyl)butane-1,3-diones and 2,5-dimethoxy-2,5-dihydrofuran catalyzed via K10 montmorillonite under solvent-free conditions
A new, concise and efficient method of one-potsynthesis of 3-(furan-2-yl)-4H-chromen-4-ones was developed using K10 montmorillonite catalysis undersolvent-freeconditions.
A simple methodology has been developed for the synthesis of o-phenolic-l,4-diketones from the o-phenolicl,
3-diketones. The reaction performed in the presence of organozinc reagents under mild conditions afforded the products
l,4-diketones in moderate yields.
Synthesis and reactivity of 1-aryl-9H-thieno[3,4-b]chromon-9-ones
作者:Mikhail M. Krayushkin、Konstantin S. Levchenko、Vladimir N. Yarovenko、Ludmila V. Christoforova、Valery A. Barachevsky、Yury A. Puankov、Tatyana M. Valova、Olga I. Kobeleva、K. Lyssenko
DOI:10.1039/b9nj00237e
日期:——
Methods were developed for the synthesis of 1-aryl-9H-thieno[3,4-b]chromon-9-ones based on the reaction of bromo and dibromo derivatives of 2-methyl-4H-chromon-4-one with thioacetamide in DMF. The thienochromones were modified and their fluorescence properties were studied. Bis(thienochromones) were synthesized by the reaction of thienochromones with ketoaldehydes.
3-diketones is described. Cyclodehydration of a range of β-diketones and thionation of the resulting flavones was achieved using thiophosphorylchloride (PSCl3) which serves as both a catalyst and thionating agent. β-diketones - flavones - thioflavones - thiophosphorylchloride