141944-85-6Relevant articles and documents
A Novel Non Photochemical Ring Contraction of 4-Pyrones to Cyclopent-2-enones
Jakopcic, K.,Kojic, J.,Orhanovic, Z.,Stiplosek, Z.,Nagl, A.,Hergold, A.
, p. 107 - 112 (2007/10/02)
Unlike comenic acid or most other 4-pyrones, methyl or ethyl comenate reacts with aromatic amines under mild conditions in the sense of ring contraction to 3-arylamino-2,4-dihydroxy-2-cyclopentenone-4-carboxylates.The structure of the new cyclopentenone d