Write a stepwise mechanism to illustrate the "crossed aldol condensation" of benzaldehy de and acetaldehyde. (a)...
Write a stepwise mechanism to illustrate the "crossed aldol condensation" of benzaldehy de and acetaldehyde. (a) How would you distinguish between the following pair by use of 'H NMR? (b) Sketch a possible spectrum for each. acetophenone and p-tolualdehyde 1. 2.
Which of the following pairs of compounds would give the most successful crossed aldol condensation when combined in the presence of a strong base? (Note: by "successful" we mean that the reaction 1) actually works, and 2) gives only a single aldol condensation product.) Pair A: and Bu Ph H н Pair B: and Ph н н Pair C: and OMe Ph and Pair D: Pair C Pair A Pair D Pair B
23. a) Write a reasonable mechanism, using good curved arrow notation, for the aldol condensation of propanal. b) Show how you would prepare the following molecule from 1-propanol, formaldehyde, and ethylamine as the only source of carbon and nitrogen, using any necessary organic or inorganic reagents 23. a) Write a reasonable mechanism, using good curved arrow notation, for the aldol condensation of propanal. i H NaOH H2O heat b) Show how you would prepare the following molecule from 1-propanol, formaldehyde,...
Write all possible products from aldol reaction between: Butanal and Propanal Formaldehyde and Acetaldehyde What is the product for aldol condensation in reaction 7(b) Write reaction for the synthesis of 3-Metyl-2-cyclohexenone using aldol condensation reaction.
1) Which of the following molecules would not undergo an aldol condensation with itself? Circle each that apply (3 points) CH, OCH, H 2) How could the following crossed-aldol condensation be performed to obtain the product selectively? Devise a method, and detail what to do in the lab below. Also include a full mechanism. (5 points) S. 7-8 4) Provide a complete, electron-pushing mechanism for the reactions shown below (7 points each) (1) "omo (2) H30 HOCI
HW 22: Enolates 1. Provide a detailed, stepwise mechanism for the base-catalyzed enolization (keto enol tautomerism) of acetaldehyde. 2. Provide the major organic product of the folowing reaction. 3. Provide the major organic product of the following reaction LDA 4. Which of the following ketones will give a positive iodoform test? A) 4-heptanone D) cyclohexanone B) 3-hexanone C)2-hexanone 5. Provide the major organic product of the following reaction. 6. Provide the structure of the major organic product which results when...
Lab : Aldol Condensation Purpose. In this lab you will conduct the Aldol condensation reaction under solid-state reaction conditions that will involve grinding reactants in the solid phase. You must read ahead and learn about this reaction and the chemical mechanism for the Aldol condensation. There are two possible products which are the initial Aldol or subsequent elimination product. You will need to isolate and purify your reaction product. You will use your melting point, IR, 1H and 13C NMR spectra to...
Postlab Assignment for Minilab 34 “Preparation of Aldol Condensation Products” 1. Explain why benzaldehyde is expected to be the most reactive aldehyde among the three aldehydes used in this experiment. (used benzaldehyde, 4-methylbenzaldehyde, and 4-methoxybenzaldehyde) 2. What is the role of aqueous NaOH used in the experiment you carried out? 3. How would you change the procedures in this experiment if you wished to synthesize benzalacetophenone (C6H5CH=CHCOC6H5). Just indicate the two main organic starting materials. 4. Write a mechanism for...
1. Provide the detailed mechanism of the aldol condensation reaction between 2 mols of benzaldehyde and 1 mol of acetone under basic conditions. Show all intermediates and steps for full credit. There are 10 steps to the complete mechanism. (2 pts for each step) 2. Give the products for the following aldol reactions. (5 points each) مل OH H 2. н 3. OH ܘܐ OH o 5. ОН" -CHO 6. OH
Organic Chemistry 2 Experimental Outline In its simplest form, the aldol condensation is a self-addition involving two molecules of the same aldehyde or ketone, in the presence of a base, and results in the formation of a new carbon-carbon bond joining the carbonyl carbon of one molecule to the a-position of the second. In many cases - if the reaction conditions aren't sufficiently mild - the initially formed aldol product reacts further in an elimination reaction to give what is...