Bisanz, Roczniki Chemii, 1958, vol. 32, p. 759,766
作者:Bisanz
DOI:——
日期:——
A Novel and Efficient Synthetic Method of Benzo[<i>f</i>]chromen-1-ones and Phenyl-4<i>H</i>-chromen-4-one through Photooxidative Cyclization of 6-[(<i>E</i>)-2-Arylvinyl]-4<i>H</i>-pyran-4-ones and 6-[(1<i>E</i>,3E)-4-Phenylbuta-1,3-dien-1-yl]-4<i>H</i>-pyran-4-one
作者:Nabila Aït-Baziz、Safouane M. Hamdi、Artur M. S. Silva、Yahia Rachedi、Maamar Hamdi、Mohamed Trari
DOI:10.1002/jhet.1694
日期:2014.9
A rapid and efficient microwave‐assisted transformation of 2‐pyrones into 4‐pyrones is reported. Then, a new photocatalytic oxidative cyclization of 6‐[(E)‐2‐arylvinyl]‐2‐methyl‐4H‐pyran‐4‐ones and 2‐methyl‐6‐[(1E,3E)‐4‐phenylbuta‐1,3‐dien‐1‐yl]‐4H‐pyran‐4‐one with UV light in the presence of a catalytic amount of CuAlO2 is described. We obtained new 3‐methyl‐1H‐benzo[f]chromen‐1‐ones and 2‐methyl