
TY  - JOUR
A1  - Cooke, RG 
T1  - Dunnione and related naphthoquinones. II. Synthesis of <I>iso</I>dunniol and <I>dl</I>-dunnione
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1950
VL  - 3
IS  - 3
SP  - 481
EP  - 486
KW  - 
UR  - https://doi.org/10.1071/CH9500481 
N2  - Claisen rearrangement of 2-(3,3-dimethylallyloxy)-1,4-naphthoquinone gives two products. One of these is identical with isodunniol, and the other, on treatment with sulphuric acid, gives a compound which is evidently the racemic modification of the natural dextrorotatory pigment dunnione. It is shown that isodunniol must be 2-hydroxy-3-(1,2-dimethylallyl)-1,4-naphthoquinone, and dunnione is &#945;&#945;&#946;-trimethyl-dihydrofurano-1,2-naphthoquinone. The racemic modifications of &#945;-dunnione and allodunnione are also described. 
ER  -

