Multiple ChoiceDraw the structure of the Claisen condensation product for each of the following compounds. 551views1rank2comments
Multiple ChoiceDraw the structure of the Claisen condensation product for each of the following compounds. 613views3rank
Multiple ChoiceGive the structure of the ester precursor for the following Claisen condensation product. 452views4rank
Textbook QuestionIndicate how each of the following compounds can be synthesized from the given starting material and any other necessary reagents: b. 391views
Textbook QuestionDraw the products of the following reactions: a. diethyl heptanedioate: (1) sodium ethoxide; (2) HCl631views
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? 430views
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) 554views
Textbook QuestionShow what esters would undergo Claisen condensation to give the following β-keto esters. (b) 579views
Textbook QuestionShow what esters would undergo Claisen condensation to give the following β-keto esters. (a) 582views
Textbook QuestionPredict the products of the following Claisen condensations. (e) < of reaction>622views
Textbook QuestionPredict the products of the following Claisen condensations. (d) < of reaction>731views
Textbook QuestionPredict the major products of the following crossed Claisen condensations. (c) < of reaction>481views
Textbook QuestionShow how you would use an aldol, Claisen, or another type of condensation to make each compound. (b) 416views
Textbook QuestionPredict the major products of the following crossed Claisen condensations. (a) < of reaction>300views
Textbook QuestionPredict the major products of the following crossed Claisen condensations. (b) < of reaction>318views
Textbook QuestionShow what esters would undergo Claisen condensation to give the following β-keto esters. (c)313views
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)295views
Textbook QuestionPropose a mechanism for the self-condensation of methyl 3-phenylpropionate promoted by sodium methoxide.352views
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)327views
Textbook QuestionPredict the products of the following Claisen condensations.(c) <IMAGE of reaction>229views
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 hydroxide229views
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.283views
Textbook QuestionPredict the products of self-condensation of the following esters.(a) methyl propanoate + NaOCH3(b) ethyl phenylacetate + NaOCH2CH3253views
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>209views
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>219views
Textbook QuestionShow how you would use an aldol, Claisen, or another type of condensation to make each compound.(d) <IMAGE>221views
Textbook QuestionWrite the mechanism for the reaction of a 1,7-diester with an alkoxide ion to form a cyclic b-keto ester.196views
Textbook QuestionDraw the products of the following reactions:d. diethyl 1,2-benzenedicarboxylate + sodium ethoxide: (1) slow addition of ethyl acetate; (2) HCl167views
Textbook QuestionShow how crossed Claisen condensations could be usedto prepare the following esters.(a) <IMAGE>256views
Textbook QuestionShow how crossed Claisen condensations could be usedto prepare the following esters.(b) <IMAGE>137views
Textbook QuestionShow how Claisen condensations could be used to makethe following compounds.(a) <IMAGE>176views
Textbook QuestionShow how Claisen condensations could be used to makethe following compounds.(b) <IMAGE>209views
Textbook QuestionShow how Claisen condensations could be used to makethe following compounds.(c) <IMAGE>198views
Textbook QuestionShow how Claisen condensations could be used to makethe following compounds.(d) <IMAGE>195views
Textbook QuestionPredict the products of the following Claisen condensations.(a) <IMAGE of reaction>(b) <IMAGE of reaction>253views
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:337views
Textbook Questiond. What product is obtained when the product of a Knoevenagel condensation is heated in an aqueous acidic solution?364views
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: 393views
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) 1280views
Textbook QuestionShow how you would use an aldol, Claisen, or another type of condensation to make each compound. (a) 412views
Textbook QuestionShow how you would use an aldol, Claisen, or another type of condensation to make each compound.(f) <IMAGE>162views