180 Proceedings of the Royal Irish Academy. 



9. Bensylidene-3 . -£ dimetkoxtf-flavamme. 



CO 



C'CHCH 



Two grammes of gaUacetophenone-diniethylether and four cubic centi- 

 metres of benzaldehyde were dissolved in twenty cubic centimetres of alcohol, 

 which had been previously saturated in the cold with anhydrous hydrochloric 

 acid. The solution, 'which turned a brown colour, was let stand for a few 

 days in a stoppered flask. The contents of the flask, which in the interval 

 had become - semi-solid, were transferred to an open dish, and the solvent was 

 allowed to evaporate spontaneously. 



After recrystallization from alcohol, about 22 grammes of a colourless 

 crystalline solid were obtained. When dried at 105 = C, it melted at 125- 

 126° C. 



The same substance was got by the condensation of 1*5 grammes of 

 benzylidene-gaUaeetophenone-dimethylether with an equal weight of 

 benzaldehyde in the presence of alcoholic hydrochloric acid. 



It gave on analysis the following results : — 



0T603 substance gave 0-1557 CO, and 0-0788 H 2 

 corresponding to C 77-5, H 5 - 46 

 C :4 H, O s requires C 77-1, H 5 - 42. 



Ben : -3.4- dimetJwxy-flavarume crystallizes in colourless needles, 



which are soluble in alcohol or ether, and very readily soluble in benzene or 

 chloroform. 



Its alcoholic solution is not coloured red on addition of ferric chloride. 



The crystals are coloured red by concentrated sulphuric acid, in which 

 they dissolve to an orange solution. 



QCH 

 t, , • i-7 o - .> • ,7 , CHO C"^ C^ CH-CH-OCH 



10. Anisylidene-SAA trtti -flavanone. 3 I x II | «♦ s 



HC^ C C: CH-CH-OCH 



^CH^ N^ 6 * 3 



On allowing a solution of 2 grammes of gallacetophenone-dimethylether 

 and i cc.s of anisaldehyde in 30 cc.s of alcohol, saturated with hydrochloric 

 acid gas, to stand for several days, it turned a dark red colour and deposited a 

 dark-coloured oil. The oil was dissolved in a mixture of chloroform and 

 alcohol, which was then boiled with animal charcoal, filtered, and let evaporate 

 spontaneously in a dish. The crystalline solid which separated weighed 2-5 

 grammes. It was heated with pyridine for half an hour and then reerystal- 

 lized a few times from boiling alcohol. 



