Design a two step synthesis that converts 3-pentanone into 3'-pentyl acetate as shown below. H2 -CH3 H2 CH3 CH3 H3C H2 Draw the structure of molecule B and write the reagents A and C for the two steps in the multi-step synthesis.
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- X Upon ozonolysis, Compound X produces two compounds: Compound Y and Compound Z. Compound Y can also be prepared from the following synthetic route: PCC 1. R₂BH, THF 1. Mg. Et₂O PCC Compound Y 2. CH₂Cl₂ 2. NaOH, HO CH₂Cl₂ 3. H₂O* From this information, draw the structures of Compounds X, Y, and Z. For Compounds X and Z, different substituents are possible. For grading purposes, just use hydrogens as the substituents. Br مرد →] ►1-lodopropane reacts with sodium ethoxide to give: Select one: O a. CH;CH,0CH¿CH2CH3 O b. CH3CH20CH2CH3 Oc. CH;CH20CH3 O d. CH30CH2CH2CH3 The set of reagents (and condition) that would give the best yield for ethyl isopropyl ether is Select one: O a. CH3CH2ONA, (CH3)2CHBr O b. CH3CH2OH, (CH3)2CHOH, H2SO4, 140 °C O c. (CH3)2CHONA, CH;CH,Br Od. CH3CH2ONA, (CH3)2CHOH7. Provide intermediate products and the final major product for the following reactions: 2-butyne reacts first with (a) Li/NH,(1), -78°C, then (b) HBr, and (c) OH/heat.
- By means of a series of equations outline a method for carrying out the ff. conversions. You may use reagents you wish. More than one step maybe required. a. acetylene b. cyclohexanone c. ethyl bromide d. benzene athanol +methylcyclohexanol acetaldehyde +phenyl ethanol B-ethyl-3-pentanol tyclopentanone 2-суano-2-pentanol benzyl alcohol 2-butanone-semicarbazone е. 3-рentanol f. cyclopentene g. 2-pentanol h. benzene i. 2-butanolWhich set of reagents would be appropriate to synthesize bromobenzene from benzene? 1. HNO3 in H2SO4; 2. H2Cr04 and heat 1. H2CrO4 and heat; 2. H2 Pd/C Br2 and FeBr3 1. CH3CH2CHCI and AICI3; 2. H204 and heat 4B12 and Fe Heat and Br2 Br2, HCI2. The reaction of 2-bromo-2-methylbutane with sodium ethoxide at 50 °C leads to the formation of 2-methyl-2-butene.
- S.10. Describe the product formed as a result of the reaction between cyclohexanone and 3-butene-2-one by also writing the mechanism of the reaction. 1'CH,ON H;C, 2 HO CH,Convert 2-pentanol into 2,3-dibromopentane. Draw structures of the starting material (2-pentanol) and final product (2,3-dibromopentane), and show the two reactions needed for this synthesis. Include the structure of the intermediate compound, and the reagents and conditions for each reaction. Then explain why 1,2-dibromopentane would not be a significant product of this synthesis.1. Write organic products of the following reactions. Show stereochemistry where appropriate. Br₂ H₂O H₂O H₂SO4 1. BH3: THF 2. H₂O2, NaOH
- g) Arrange the following acylating reagents in terms of increasing reactivity. Discuss your choices. `NH -NO 2 `NH `NH. i ii i h) Arrange the following acylating reagents in terms of decreasing reactivity. Discuss you choices comprehensively. H3C O. F3C H3C (а) (b) (c) i) Which strategy is used in the following reaction to prevent alcohol formation? Motivate. OCH 3 Na H2C- (after H 0*workup)Write the Ky reactions for pyridine, for sodium 2-mercaptoethanol, and for cyanide. H+ binds to S in sodium 2-mercaptoethanol and to C in cyanide. (Hint: Spectator ions, which do not react in solution, appear on both sides of the reaction and can be removed.) N: HOCH.CHS: Na+ CN Pyridine Sodium 2-mercaptoethanol Cyanide Refer to the Ka values below for their conjugate acids. Which of the three bases shown above is the strongest? NH HOCH.CH.SH HCN Pyridinium ion K. = 6.3 x 10-6 2-Mercaptoethanol K. = 1.9 X 10-10 Hydrogen cyanide K = 6.2 x 10-10Write/illustrate the detailed reaction mechanisms for the following transformations: 1. Synthesis of 1-bromooctane from 1-octanol 2. Synthesis of 1-pentene from 1-pentanol