反应详情

A mixture of 16.5 g of 1-bromo-2-nonadecyne in 50 ml of ethanol is added to 3.0 g of 60% sodium hydride and 11.4 ml of diethyl malonate in 100 ml of ethanol. This mixture is stirred one hour and then evaporated. The residue is washed with ether, twice with dilute hydrochloric acid and brine. The residue is then purified by flash chromatography, (5% ethyl acetate:petroleum ether), to give 12.1 g of the desired compound as white needles, mp. 33°-34° C.

1. customevaporated
2. washThe residue is washed with ether, twice with dilute hydrochloric acid and brine
3. customThe residue is then purified by flash chromatography, (5% ethyl acetate:petroleum ether),