Intramolecularhydrogenbond (IMHB) interactions have attracted considerable attention due to their central role in molecular structure, chemical reactivity, and interactions of biologically active molecules. Precise correlations of the strength of IMHB's with experimental parameters are a key goal in order to model compounds for drug discovery. In this work, we carry out an experimental (NMR) and
Dienone-phenol rearrangement of naphthalenetriones. A route to 10-acetoxy5,6,7,8-tetra hydrophenanthrene-1,4-diones
作者:Ra�l Cassis、M�nica Scholz、Ricardo Tapia、Jaime A. Valderrama
DOI:10.1039/p19870002855
日期:——
Naphthalene-1,4,5(8H)-triones (17) and (18) prepared in a three-step approach from the corresponding acylbenzoquinones (1) and (2), undergo an unusually rapid dienone-phenolrearrangement in acetic anhydride–sulphuric acid solution to give 5-acetoxy-7,8-dimethyl- and 5-acetoxy-6,7,8-trimethyl-1,4-naphthoquinone (19) and (20) in good yields.