a -D-galactopyranose is converted to a glycoside in the presence of acid and alcohol. The product...
The reaction of a carboxylic acid with an alcohol in the presence of acid is termed Fischer esterification. Ohau. Choo он + СН,ОН На он, + но The electrophile in this reaction is Compound C functions as in this reaction. a. a base scavenger b. a solvent c. a catalyst d. a neutralizer
After the addition of aqueous acid, the product, vanillyl alcohol, precipitates out of the solution. Draw the structure of vanillyl alcohol. Explain why the alcohol is much less soluble in aqueous acid than the salt of vanillin.
14.73 An unknown alcohol was treated with chromic acid to give a product with the following IR spectrum. Which of the following state- ments must be true? 100 % Transmittance 0 + 4000 3500 1500 1000 3000 2500 2000 Wavenumber (cm-") (a) The unknown compound must be a primary alcohol. (b) The unknown compound must be a secondary alcohol. (c) The unknown compound must be a tertiary alcohol. (d) The unknown compound must be acyclic.
IV.Dihydropyran (below) reacts readily with an alcohol in the presence of a trace of anhydrous H2SO4 to form a tetrahydropyranyl ether. (15 pts] +ROH , More Dihydropyran Tetrahydropyranyl ether (a) The tetrahydropyranyl ether can also be classified as an), (6) Tetrahydropyranyl ethers are stable in aqueous base by hydrolyze rapidly in aqueous acid to yield the original alcohol and another compound. What is the other compound?
5. Which of the following compounds will produce a tertiary alcohol when treated with aqueous acid (H2O, H30*)? all of them none of them А B с D E
Draw the major product of the following alcohol dehydration in the presence of H2SO4. Use the Zaitsev rule (no rearrangements) to predict the major product when necessary. Include all hydrogen atoms. Draw the major product of the following alcohol dehydration in the presence of H2SO4. Use the Zaitsev rule (no rearrangements) to predict the major product when necessary. Include all hydrogen atoms.
In the presence of an acid catalyst, the major product of ethanoic acid and ethanol is: A. acetic anhydride B. butane C. diethyl ether D. ethyl acetate
What peak in the IR spectrum most clearly demonstrates the presence of alcohol product? If the product had unreacted aldehyde remaining, what IR peak would indicate the presence of this contaminant? % Transmittance 4000 100 grignard 3500 3445.90 alcohol 0-H stretching 3000 2955.99 C-H alkane stretching 2869.74 2835.23 2500 Wavenumbers (cm-1) 2000 C-H stretching 1610.54 1585.02 1500 1509.80 1464.30 1442.09 1381.94 1301.38 1242.79 1171.03 1107.61 1000 1033.47 958 30 935.19 834.42 798.16 766.54 638.11 551.44 500
In the synthesis of phenacetin from acetaminophen, an alcohol is converted to an ether. a. Is the–OH in acetaminophen a nucleophile or electrophile? b. What is the function of the ethanol/NaOH? c. What is the function of the CH3 CH2I? d. Describe the mechanism of this reaction.Identify the nucleophile in each step. Use curved arrows to show bondsbreaking and forming. What is the leaving group? e. Would you get phenacetin by treating acetaminophen with sulfuric acid followed by ethanol? Give...
Draw the ether formed when ethyl alcohol is heated in the presence of concentrated sulfuric acid.