Organic 2 Review Problem 312

Organic 2 Review Problem 312 - 296 PRACTICAL ORGANIC...

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296 PRACTICAL ORGANIC CHEMISTRY CH 3 CH 3 CH /CH EtOOC-CH, 6 H 2 C-COOEt EtOOC-C T fc I —- Il l —>• CH 3 -CO OC-CH 3 CH 3 -C x /C CH 3 NH 3 N 3 (D H CH 3 EtOOC -/\-COOEt H 3 C-1( J-CH 3 (U) N suspension of this salt when treated with hydrogen sulphide gives the dicar- boxylic acid. Required: Ethyl acetoacetate, 32 g. (32 ml.); acetaldehyde- ammonia, 10 g. (Note. The aldehyde-ammonia should preferably be fresh material: the quantity should be increased to 15 g. if an old sample, which has formed brown sticky lumps, is employed.) Gently warm a mixture of 32 g. (32 ml.) of ethyl acetoacetate and 10 g. of aldehyde-ammonia in a 400 ml. beaker by direct heating on a gauze, stirring the mixture carefully with a thermo- meter. As soon as the reaction starts, remove the heating, and replace it when the reaction slackens, but do not allow the temperature of the mixture to exceed 100-110°: the reaction is rapidly completed. Add to the mixture about twice its volume of 2A r -hydrochloric acid, and stir the mass until the deposit
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This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.

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