
TY  - JOUR
A1  - Jurd, L 
T1  - 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
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1980
VL  - 33
IS  - 7
SP  - 1603
EP  - 1610
KW  - 
UR  - https://doi.org/10.1071/CH9801603 
N2  - 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). 
ER  -

