192 Proceedings of the Royal Irish Academy. 



8. Dianisylidene- If' . If -dinuthoxy-diflavanone (X). 







CH 3 . C 6 H 4 . CH /\/\/\ CH . CsHj . OCH3 



CH3O . C 6 H 4 . CH : C \/\/\/ C : CH . C 6 Hj . OCH 3 



CO CO 



A mixture of 5 grams of diaeetoresorcinol, 20 c.cs. of anisaldehyde, and 

 200 c.cs. of alcohol was saturated with hydrochloric acid gas, and allowed to 

 stand for five days. The dark red, oily product was washed with cold alcohol, 

 and after several crystallizations from boiling xylene it was obtained in the 

 form of yellow crystals which melted at 249°-251° C, and gave on analysis 

 the following results : — 



0-1703 substance gave 0-4704 C0 2 and 0-0790 H 2 

 corresponding to C 75*33, H 5-15 

 CwHaA requires C 75'67, H 5-14. 



Dianisylidene- £ . ^'-dimethoxy-diflavanone crystallizes from boiling xylene 

 in yellow prisms, which are soluble in chloroform, moderately soluble in hot 

 benzene or hot xylene, and nearly insoluble in alcohol. 



Like anisylidene- 2-p . methoxycinnamoyl-3-hydroxy-4' methoxy-flavanone 

 the deep blue of its solution in concentrated sulphuric acid rapidly changes to 

 purple-red. 



