
%0 Journal Article
%A Jurd, L 
%T Quinones and quinone methides. VII. Reactions of 1,4-naphthoquinone and 1,4-benzoquinones with 4-hydroxy-2H-1-benzopyran-2-one and 5,5-dimethylcyclohexane-1,3-dione in acid solutions
%J Australian Journal of Chemistry
%D 1980/07/01
%V 33
%N 7
%P 1603-1610
%K 
%R https://doi.org/10.1071/CH9801603
%U https://www.publish.csiro.au/paper/CH9801603 
%X 4-Hydroxy-2H-1-benzopyran-2-one (4) reacts with 1,4-naphthoquinone, 2- methoxy-1,4-benzoquinone and 1,4-benzoquinone in aqueous acetic acid solutions to yield the quinone (6) and the quinols (11)and (2), respectively. With 5,5-dimethylcyclohexane-1,3-dione, 1,4- naphthoquinone forms a bisfurano compound (9) while 1,4-benzoquinone yields the bisfurano compound (18) and the monophenolic furano derivative (17). The blue product formed by acid catalysed dimerization of 2-methoxy-1,4-benzoquinone forms a diacetate, the n.m.r. spectra of which is in accord with structure (15b). 
