Luís M. Carvalho, Artur M. S. Silva, C. Martins
Feb 24, 2003
Citations
0
Influential Citations
4
Citations
Journal
Tetrahedron Letters
Abstract
Abstract The structure of the intensely coloured red product obtained through the reaction of 1,8-naphthalenediol with 1,1-diphenylprop-2-yn-1-ol was reinvestigated. Instead of the expected permanent open form of the naphthopyran, the dye presents the α,β-unsaturated chain at a different position of the naphthalene nucleus. The structure of this compound was elucidated on the basis of detailed spectral analysis, including 2D NMR experiments.