Experimental6 1, 4, 7-Trimethylindan.-A mixture of 97 g. of 3, 4, 7-trimethylindanone,* bp 96- 100'(1.5-2 mm.), 100 ml. of water, 250 ml. of concd. hydrochloric acid and 250 g. of freshly cleaned and amalgamated mossy zinc was refluxed for 23 hours, three 100-ml. portions of hydrochloric acid being added at six-hour intervals. The cooled reaction mixture was diluted with water and extracted with ether. From the dried ether extracts there was obtained 80.5 ...
