Acetonitrile → 2-Cyano-5-(3-phenoxypropoxy)indan-1,3-dione

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A mixture of dimethyl 4-(3-phenoxypropoxy)phthalate (6.5 g; 0.019 mole), acetonitrile (10ml) and sodium hydride (0.69 g of 100%) was stirred at 100° for 6 hours and dry ether added to the cooled yellow product. The solid which separated was filtered off, dissolved in water and the solution strongly acidified with concentrated hydrochloric acid. Filtration of the precipitated solid gave the title compound which recrystallised from ethanol dilute hydrochloric acid with mp 148°-150° (dec) and in 86% yield. (Found; C, 69.00; H, 4.90; N, 4.41; C19H15NO4 0.5 H2O requires; C, 69.08; H, 4.88; N, 4.24%).

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