Irradiation (λ =313 nm) of the 4-pyrrolin-3-ones 1a–1c in acetone-, 3-pentanone-and cyclopentanone solution affords the title compounds 2, formally via H-abstrac-tion by the excited ketone and recombination of the radical pair formed.
在
丙酮-,
3-戊酮-和
环戊酮溶液中辐照4-
吡咯啉-3-酮1a-1c(λ= 313 nm),得到标题化合物2,其形式是通过被激发的酮进行的H吸收和自由基的
重组对形成。