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.
A new protocol for total synthesis of natural product frutinone A was accomplished in three steps by using inexpensive 2′-hydroxyacetophenone as starting material. The key intermediate 3-(2-chlorobenzoyl)-4-hydroxycoumarin was synthesized in one pot through Baker–Venkataraman rearrangement of 2-acetylphenyl 2-chlorobenzoate followed by introduction of methyl chloroformate under basic conditions. Then