3. Glycolic Acid is used for making a polymer used as an absorbable surgical suture material. Ho OH 3.1 Draw the structure of a linear trimer of glycolic acid. glycolic acid trimer 3.2 Polyglycolic acid is hydrolyzed in the human body. Write a mechanism to show the hydrolysis of a dimer of glycolic acid.
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- 21.95 A student carries out the following sequence of reactions. The IR and 1°C NMR spectra are shown for the product C. Draw structures for A-C. (Remember that the 13C NMR signal at 77 ppm is due to the CDCI3 solvent.) NaOC(CH)3 A (CH3)3COH 1. NaOEt, EtOH 1. NaOH, H,O C В 2. H,0º, A EtO OEt 2. Br(CH,),Br 100 90 80 70 60 – 50 40 - 30 20 C 4500 4000 3500 3000 2500 2000 1500 1000 500 200 175 150 125 100 75 50 25 Wavenumbers (cm-1) Chemical shift (ppm) % TransmittanceSharpless epoxidation of allylic alcohol X forms compound Y. Treatment of Y with NaOH and C6H5SH in an alcohol–water mixture forms Z. Identify the structure of Y and draw a mechanism for the conversion of Y to Z. Account for the stereochemistry of the stereogenic centers in Z. Z has been used as an intermediate in the synthesis of chiral carbohydrates.Which of the following statements is correct? A) The haloform reaction proceeds under very difficult conditions and the yield is very low. B) The haloform reaction is used only for the identification of compounds containing secondary alcohol groups. C) Methyl ketones or alcohols are oxidized with halogens in acidic solutions to give carboxylic acids and the appropriate haloform product. D) Enolate anions react rapidly with halogens to give alpha-halocarbonyl compounds.
- An unknown compound A of molecular formula C10H18O reacts with H2SO4 to form two compounds (B and C)of molecular formula C10H16. B and C both react with H2 in the presence of Pd-C to form decalin. Ozonolysis of B forms D, and ozonolysis of C forms a diketone E of molecular formula C10H16O2. Identify the structures of compounds A, B, C, and E.Sharpless epoxidation of allylic alcohol X forms compound Y. Treatment of Y with NaOH and C6H5SH in an alcohol–water mixture forms Z. Identify the structure of Y and draw a mechanism for the conversion of Y to Z. Account for the stereochemistry of the stereogenic centers in Z. Z has been used as an intermediate in the synthesis of chiral carbohydrates.A synthetic organic molecule, G, which contains both aldehyde and ether functional groups, is subjected to a series of reactions in a multi-step synthesis pathway. In the first step, G undergoes a Wittig reaction, leading to the formation of an alkene, H. Subsequently, H is treated with an ozone (O3) reagent followed by a reducing agent in an ozonolysis reaction, resulting in the formation of two different products, I and J. Considering the functional groups present in G and the nature of the reactions involved, what are the most probable structures or functional groups present in products I and J? A. I contains a carboxylic acid group, and J contains an aldehyde group. B. I contains a ketone group, and J contains an alcohol group. C. I and J both contain aldehyde groups. D. I contains an ester group, and J contains a ketone group. Don't use chat gpt.
- cOOEt 1. EtO Na* NaOH, H20 HCI, H2O compound a compound b compound c (C3H1002) 2. HCI, H2O Heat Heat `COOEt Claisen condensation between a diethyl ester and an ethyl ester followed by saponification, acidification, and decarboxylation forms a diketone. Work out this synthesis on a separate sheet of paper, and then draw the structure of compound a. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. Do not include lone pairs in your answer. They will not be considered in the grading. • Do not include counter-ions, e.g., Na", I", in your answer.Devise a synthesis of CH3CH2C≡CCH2CH2CH3 using CH3CH2CH=CH2 as the starting material. You may use any other organic compounds or inorganic reagents.Compound A is a derivative of the carbohydrate perosamine, which is found in the antibiotic perimycin. When A is treated with acetic anhydride in methanol, a monoacyl derivative B (C9H17NO5) is obtained in 73% yield. What is the structure of compound B?
- From what you have learned about enols and the hydration of alkynes, predict what product is formed by the acidcatalyzed hydration of CH3CH2CH2C = COCH3. Draw a stepwise mechanism that illustrates how it is formed.Sulfur ylides, like the phosphorus ylides of Chapter 21, are useful intermediates in organic synthesis. Methyl trans-chrysanthemate, an intermediate in the synthesis of the insecticide pyrethrin I (Section 26.4), can be prepared from diene A and a sulfur ylide. Draw a stepwise mechanism for this reaction.Chrysanthemic acid occurs as a mixture of esters in flowers of the chrysanthemum (pyrethrum) family. Reduction of chrysanthemic acid to its alcohol followed by conversion of the alcohol to its tosylate gives chrysanthemyl tosylate. Solvolysis alcohols. of the tosylate gives a mixture of artemesia and yomogi HO НО Chrysanthemic acid Chrysanthemyl alcohol OH TsO DMSO Chrysanthemyl tosylate Artemesia alcohol Yomogi alcohol Propose a mechanism for the formation of these alcohols from chrysanthemyl tosylate.