In order to complete the malonic ester synthesis you need to do which of the following?...
In order to complete the malonic ester synthesis you need to do which of the following?
Heat with aqueous HCl
Add a catalytic amount of sodium acetate
Shake vigorously to cause decarboxylation
Cool on ice and add aqueous NaOH
Homework Answers
Malonic ester synthesis starts from diethyl malonate.In the synthesis, it is treated with an acid to convert the esters to carboxylic acid group and then it is heated to decarboxylate one -COOH group.
So, correct option is:
Heat with aqueous HCl
Add Answer to:
In order to complete the malonic ester synthesis you need to do
which of the following?...
11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid...
11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid in order to generate the final product. Why? C. the ionized cation partitions to the aqueous layer A. the alkoxy cation needs to be eliminated in the separatory funnel B. the stabilized enolate adds a proton D. this generates heat leading to decarboxylation 14. Which reagent(s) is(are) needed to complete the desired synthesis?: O ? A. NaOM, H Meo Н. I dil. HCI B....
10. Select the compound that can not be made using the malonic ester synthesis: O o...
10. Select the compound that can not be made using the malonic ester synthesis: O o O OH MeO OMe OH Ph ОН A. B. Ph C. D. 11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid in order to generate the final product. Why? A. the alkoxy cation needs to be eliminated C. the ionized cation partitions to the aqueous layer B. the stabilized enolate adds a proton in the separatory funnel...
Which of the following is true of the decarboxylation mechanism for malonic ester synthesis? A. The...
Which of the following is true of the decarboxylation mechanism for malonic ester synthesis? A. The reaction happens to most carboxylic acids when heated B. The reaction involves a cyclic mechanism involving an enol C. The mechanism involves a radical that is stabilized by the additional ester group D. The diester compound undergoes a hydride shift to form a stable carbocation
10. Select the compound that can not be made using the malonic ester synthesis: O O...
10. Select the compound that can not be made using the malonic ester synthesis: O O OH MeO Оме OH Ph OH A. B. Ph C. D. 11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid in order to generate the final product. Why? A. the alkoxy cation needs to be eliminated C. the ionized cation partitions to the aqueous layer B. the stabilized enolate adds a proton in the separatory funnel D....
11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid...
11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid in order to generate the final product. Why? A the alkoxy cation needs to be eliminated C. the ionized cation partitions to the aqueous layer B. the stabilized enolate adds a proton in the separatory funnel D. this generates heat leading to decarboxylation 0 12. Select the proper sequence of reactions needed to produce the desired final product: ? A. NaoMe, Mel/NaOMe, allyl-Br /...
Please design a synthesis route that leads to the following compound starting from malonic ester. You...
Please design a synthesis route that leads to the following compound starting from malonic ester. You can use any reagents.
Please show the entire mechanism for this problem, thank you! 46) Malonic ester (diethyl malonate) is...
Please show the entire mechanism for this problem, thank
you!
46) Malonic ester (diethyl malonate) is treated successively with sodium ethoxide (1 eq.), 1- bromopentane, potassium tert-butoxide, iodomethane, hot aqueous NaOH, HCl, and heat. What is the final product? a) 2-Methylheptanoic acid b) 3-Methylhexanoic acid c) 3-Methylpentanoic acid d) 2-Methylpentanoic acid e) Ethyl 2-methylheptanoate 47) What would be the major product of the following reaction sequence? 1. BH PCC 1. LDA (-78°C) 2. H,02, OH CH,C12 2. CH3CH,Br ఎంత a)...
3) Which of the following acids can be prepared by a malonic ester synthesis? Show th...
3) Which of the following acids can be prepared by a malonic ester synthesis? Show th steps and the reagents you would use. соон b) a) COOH c) COOH d) 4) The following compounds can be made using the aldol condensation. Write the steps and reagents you would use. -CHO b) a) CHO c) он d) он о
125. Which of the following is an example of the synthesis of the malonic ester? Which...
125. Which of the following is an example of the synthesis of
the malonic ester?
Which the answer of the problem 125, answer the following
parts:
125.1 Write the chemical equation that illustrates the
Michael-type conjugate addition, followed by Robinson's
annexation.
125.2. Write the chemical equation that illustrates the
intramolecular Claisen condensation to generate a new 5-member
cycle and that the final product contains two cycles.
125.3 Establish the sequence of steps by which you can prepare the
spirit or...
Steps for the separation by extraction of benzil? What order of steps do I need to...
Steps for the separation by extraction of benzil? What order of steps do I need to place it in? Describe the procedure for the separation by extraction of the neutral compound, benzil, from the basic compound, p-chloroaniline. Both compounds are soluble in dichloromethane and insoluble in water. At the end of the prodecure, you must have solid benzil and solid p-chloroaniline separated Note: dichloromethane is a highly volatile solvent, thus if you boil a solution of a compound in dichloromethane...
11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid in order to generate the final product. Why? C. the ionized cation partitions to the aqueous layer A. the alkoxy cation needs to be eliminated in the separatory funnel B. the stabilized enolate adds a proton D. this generates heat leading to decarboxylation 14. Which reagent(s) is(are) needed to complete the desired synthesis?: O ? A. NaOM, H Meo Н. I dil. HCI B....
10. Select the compound that can not be made using the malonic ester synthesis: O o O OH MeO OMe OH Ph ОН A. B. Ph C. D. 11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid in order to generate the final product. Why? A. the alkoxy cation needs to be eliminated C. the ionized cation partitions to the aqueous layer B. the stabilized enolate adds a proton in the separatory funnel...
10. Select the compound that can not be made using the malonic ester synthesis: O O OH MeO Оме OH Ph OH A. B. Ph C. D. 11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid in order to generate the final product. Why? A. the alkoxy cation needs to be eliminated C. the ionized cation partitions to the aqueous layer B. the stabilized enolate adds a proton in the separatory funnel D....
11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid in order to generate the final product. Why? A the alkoxy cation needs to be eliminated C. the ionized cation partitions to the aqueous layer B. the stabilized enolate adds a proton in the separatory funnel D. this generates heat leading to decarboxylation 0 12. Select the proper sequence of reactions needed to produce the desired final product: ? A. NaoMe, Mel/NaOMe, allyl-Br /...
Please design a synthesis route that leads to the following compound starting from malonic ester. You can use any reagents.
Please show the entire mechanism for this problem, thank
you!
46) Malonic ester (diethyl malonate) is treated successively with sodium ethoxide (1 eq.), 1- bromopentane, potassium tert-butoxide, iodomethane, hot aqueous NaOH, HCl, and heat. What is the final product? a) 2-Methylheptanoic acid b) 3-Methylhexanoic acid c) 3-Methylpentanoic acid d) 2-Methylpentanoic acid e) Ethyl 2-methylheptanoate 47) What would be the major product of the following reaction sequence? 1. BH PCC 1. LDA (-78°C) 2. H,02, OH CH,C12 2. CH3CH,Br ఎంత a)...
3) Which of the following acids can be prepared by a malonic ester synthesis? Show th steps and the reagents you would use. соон b) a) COOH c) COOH d) 4) The following compounds can be made using the aldol condensation. Write the steps and reagents you would use. -CHO b) a) CHO c) он d) он о
125. Which of the following is an example of the synthesis of
the malonic ester?
Which the answer of the problem 125, answer the following
parts:
125.1 Write the chemical equation that illustrates the
Michael-type conjugate addition, followed by Robinson's
annexation.
125.2. Write the chemical equation that illustrates the
intramolecular Claisen condensation to generate a new 5-member
cycle and that the final product contains two cycles.
125.3 Establish the sequence of steps by which you can prepare the
spirit or...
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