88 Proceedings of the Royal Irish Academy. 



soluble in hot chloroform, and sparingly soluble in hot benzene and xylol Its 

 alcoholic solution gives a brownish-red colour with ferric chloride. 



Owing to the small yield obtained in this condensation, it was impossible 

 to determine whether a diflavone derivative was formed when the substance 

 was heated with hydriodic acid. 



Di-a-phenylaceiylueeto-resorcinol-dirnethylether. 



CHsO /\; OCH3 



I 

 CsHs • CHj ■ CO • CH, • CO i I CO • CH2 • CO • CHo • CsHj 



Five grams of diacetoresoreiuol-dimethylether were dissolved with 

 warming in 50 cos. of phenyl-acetic ester, and 2 grams of sodium wire were 

 then added. The reaction was slow at first, but on heating for a short time 

 on a sand-bath it became very ^^gorous, and a brownish soKd separated. The 

 mixture was further heated for 15 minutes on the water-bath, and allowed to 

 stand 12 hours in a stoppered flask. Moist ether was then added, and the 

 diketone extracted with dilute potash. A certain amount of oily matter was 

 obtained, which did not dissolve in the ether, and was only sparingly soluble 

 in potash. Acidification of this oil, and attempted crystallization from alcohol, 

 gave only a very small amount of crystalline substance. The potash extract 

 was acidified with carbon dioxide, when a small amount of yellowish solid 

 separated. This solid was filtered, washed with water, and recrystallized 

 several times from alcohol, being finally obtained as colourless needles, which 

 melted at 131-132° C. 



On analysis it gave the following results : — 



0-1499 substance gave 0-404 CO, and 0-0805 H.O 

 corresponding to C 7350, H 5-96 

 Ca^jsOs requires C 73-36, H 5.67. 



Bi-a-phtaylacetylaceto-resorcijiol-dimelhyktlier is soluble in cold acetone 

 and benzene, readily soluble in cold chloroform, slightly soluble in cold, and 

 soluble in hot, alcohol. It was not obtained in sufficient quantity to test its 

 beha\-iour on heating with concentrated hydriodic acid. 



Diaeetylacdo-resordnol-dimethylether. 



CH3O /^ OCH5 



i i 

 CH3 • CO • CHa • CO ' y CO • CH: • CO • CHj 



A mixtme of 5 grams of diacetoresorcinol-cUmethylether and 50 c.cs. of 

 acetic ester was heated to boiling, and after 1-5 gram of sodium wire was 

 added the mixture was warmed on the water- bath for half an hour. The 



