10 Art. 3.— Y. Shibata : 



camphoric anhydride, the one with formula I will be obtained in 

 better _yield than the other. In fact Komppa states in his paper 

 that he obtained an oily substance along with the crystalline 

 dimethylcampholide, the former being in far larger quantity than 

 the latter. He did not, however, further examine the oily 

 substance which should have contained the oil}^ modification of the 

 campholide. • 



The action of alcolwlic iiotash on dimethylcampholide : — An alcoholic 

 solution of dimethylcampholide was treated with an excess of 

 alcoholic potash in the usual manner, and on acidifjdng the clear 

 alkaline solution, white turbidity soon appeared. On letting it 

 stand over night, an oily substance was obtained at the bottom of 

 the vessel. The oil was extracted with ether, the etherial solution 

 dried over calcium chloride, and the ether driven off. The residue 

 was fractionated, when the main part of it passed over at 165-166° 

 under 16 mm. pressure. On analysis the following results were 

 obtained: — 



0-2055 gave 0-5451 CO^ and 0-1887 H.,0. C =72-36 ; H= 10-27. 

 CiJ-I,,oO., requeris C = 73-39 ; H= 10-30 per cent. 



The oil, thus separated by acidifying the alkaline solution, is no 

 more soluble in alkali. This fact and the results of the analysis 

 show that the oil is the original dimethylcampholide, dimethyl- 

 oxycampholic acid, formed by the hydrolysis of the campholide, 

 having been brought back into its lactone by the action of the 

 hydrochloric acid. 



The Action of Magnesium Isopropyl Iodide 

 on Dimethyl d-Camphorate. 



The reaction product is a colourless viscous oil with a feeble 

 odour somewhat resembling that of camphor. On fractionation, 



