Multiple ChoiceDraw the structure of the Claisen condensation product for each of the following compounds. 554views1rank2comments
Multiple ChoiceDraw the structure of the Claisen condensation product for each of the following compounds. 616views3rank
Multiple ChoiceGive the structure of the ester precursor for the following Claisen condensation product. 453views4rank
Textbook QuestionIndicate how each of the following compounds can be synthesized from the given starting material and any other necessary reagents: b. 393views
Textbook QuestionDraw the products of the following reactions: a. diethyl heptanedioate: (1) sodium ethoxide; (2) HCl635views
Textbook QuestionThere are other condensation reactions similar to the aldol and Claisen condensations: b. What compound is formed if water is added to the product of a Perkin condensation? 432views
Textbook QuestionSome (but not all) of the following keto esters can be formed by Dieckmann condensations. Determine which ones are possible, and draw the starting diesters. (c) (d) 557views
Textbook QuestionShow what esters would undergo Claisen condensation to give the following β-keto esters. (b) 583views
Textbook QuestionShow what esters would undergo Claisen condensation to give the following β-keto esters. (a) 585views
Textbook QuestionPredict the products of the following Claisen condensations. (e) < of reaction>626views
Textbook QuestionPredict the products of the following Claisen condensations. (d) < of reaction>734views
Textbook QuestionPredict the major products of the following crossed Claisen condensations. (c) < of reaction>484views
Textbook QuestionShow how you would use an aldol, Claisen, or another type of condensation to make each compound. (b) 419views
Textbook QuestionPredict the major products of the following crossed Claisen condensations. (a) < of reaction>304views
Textbook QuestionPredict the major products of the following crossed Claisen condensations. (b) < of reaction>320views
Textbook QuestionShow what esters would undergo Claisen condensation to give the following β-keto esters. (c)316views
Textbook QuestionSome (but not all) of the following keto esters can be formed by Dieckmann condensations. Determine which ones are possible, and draw the starting diesters. (a) (b)297views
Textbook QuestionPropose a mechanism for the self-condensation of methyl 3-phenylpropionate promoted by sodium methoxide.354views
Textbook QuestionSome (but not all) of the following keto esters can be formed by Dieckmann condensations. Determine which ones are possible, and draw the starting diesters. (a) (b) (c) (d)330views
Textbook QuestionPredict the products of the following Claisen condensations.(c) <IMAGE of reaction>230views
Textbook QuestionEthoxide is used as the base in the condensation of ethyl acetate to avoid some unwanted side reactions. Show what side reactions would occur if the following bases were used.(a) sodium methoxide(b) sodium hydroxide231views
Textbook QuestionEsters with only one α hydrogen generally give poor yields in the Claisen condensation. Propose a mechanism for the Claisen condensation of ethyl isobutyrate, and explain why a poor yield is obtained.287views
Textbook QuestionPredict the products of self-condensation of the following esters.(a) methyl propanoate + NaOCH3(b) ethyl phenylacetate + NaOCH2CH3256views
Textbook QuestionPredict the products from crossed Claisen condensation of the following pairs of esters. Indicate which combinations are poor choices for crossed Claisen condensations.(a) <IMAGE of reaction>(b) <IMAGE of reaction>213views
Textbook QuestionPredict the products from crossed Claisen condensation of the following pairs of esters. Indicate which combinations are poor choices for crossed Claisen condensations.(c) <IMAGE of reaction>(d) <IMAGE of reaction>221views
Textbook QuestionShow how you would use an aldol, Claisen, or another type of condensation to make each compound.(d) <IMAGE>222views
Textbook QuestionWrite the mechanism for the reaction of a 1,7-diester with an alkoxide ion to form a cyclic b-keto ester.198views
Textbook QuestionDraw the products of the following reactions:d. diethyl 1,2-benzenedicarboxylate + sodium ethoxide: (1) slow addition of ethyl acetate; (2) HCl169views
Textbook QuestionShow how crossed Claisen condensations could be usedto prepare the following esters.(a) <IMAGE>258views
Textbook QuestionShow how crossed Claisen condensations could be usedto prepare the following esters.(b) <IMAGE>142views
Textbook QuestionShow how Claisen condensations could be used to makethe following compounds.(a) <IMAGE>178views
Textbook QuestionShow how Claisen condensations could be used to makethe following compounds.(b) <IMAGE>211views
Textbook QuestionShow how Claisen condensations could be used to makethe following compounds.(c) <IMAGE>200views
Textbook QuestionShow how Claisen condensations could be used to makethe following compounds.(d) <IMAGE>197views
Textbook QuestionPredict the products of the following Claisen condensations.(a) <IMAGE of reaction>(b) <IMAGE of reaction>256views
Textbook QuestionThere are other condensation reactions similar to the aldol and Claisen condensations: a. The Perkin condensation is the condensation of an aromatic aldehyde and acetic anhydride. Draw the product obtained from the following Perkin condensation:338views
Textbook Questiond. What product is obtained when the product of a Knoevenagel condensation is heated in an aqueous acidic solution?366views
Textbook QuestionThere are other condensation reactions similar to the aldol and Claisen condensations: c. The Knoevenagel condensation is the condensation of an aldehyde or a ketone that has no a-hydrogens and a compound such as diethyl malonate that has an a-carbon flanked by two electron-withdrawing groups. Draw the product obtained from the following Knoevenagel condensation: 397views
Textbook QuestionThe Knoevenagel condensation is a special case of the aldol condensation in which an active methylene compound reacts with an aldehyde or ketone, in the presence of a secondary amine as a basic catalyst, to produce a new C=C. Show the starting materials that made each of these by a Knoevenagel condensation. (a) 1285views
Textbook QuestionShow how you would use an aldol, Claisen, or another type of condensation to make each compound. (a) 416views
Textbook QuestionShow how you would use an aldol, Claisen, or another type of condensation to make each compound.(f) <IMAGE>165views