73733-01-4Relevant academic research and scientific papers
4,4'-Binaphthylidene-1,1'-diones - Colour and Structure
Kral, Andreas,Laatsch, Hartmut
, p. 1401 - 1407 (2007/10/02)
Synthesis and properties of various 4,4'-binaphthylidene-1,1'-diones are described.The UV spectra of the deep red to purple diones may be calculated on the base of substituent increments.The experimental values of the analyzed substituents can be reproduced using PPP calculations with satisfying accuracy, which makes it possible to predict also absorption maxima of hitherto unknown 4,4'-binaphthylidene-1,1'-diones.Keywords: 4,4'-Binaphthylidene-1,1'-diones, Phenol Oxidation
TRANSFORMATIONS OF o-NAPHTHOQUINONE DIAZIDES IN ALIPHATIC ALCOHOLS
Ponomareva, R. P.,Komagorov, A. M.,Andronova, N. A.
, p. 140 - 149 (2007/10/02)
During photodecomposition and thermal decomposition in hydroxyl-containing media (alcohols, water) o-naphthoquinone diazides in electronically excited and vibrationally excited states eliminate nitrogen, forming the corresponding ketocarbenes.The singlet ketocarbenes undergo intramolecular transformation (with ring contraction and the formation of 3-indenecarboxylic acid or its esters) and intermolecular transformation, forming 1,2-hydroxyalkoxynaphthalenes in reaction with alcohols.The triplet ketocarbenes undergo intermolecular transformations, forming 1- or 2-hydroxynaphthalenes.The composition and ratio of the final products from the decomposition of o-naphthoquinone diazides in alcohols depend significantly on the nature of the alcohol, the presence of oxygen, the presence of radical acceptors, and the spectral composition of the exciting light.
