Interpretation:
The reactions for the synthesis routes for
Concept introduction:
The Lindlar’s catalyst consists of hydrogen in the presence of metal catalyst used to produce
Reduction is a process in which hydrogen atoms are added to a compound.
Usual reagents used in reduction process include
The addition of hydrogen to double or triple bond is a hydrogenation reaction.
Hydrogenation of alkenes or alkynes is an addition reaction, which is done in the presence of reducing agents, such as
The number of hydrogen molecules reacted is equal to the number of double bond present.
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Organic Chemistry
- Practice Problem 13.36b Problem 13.34 outlines a general method for the preparation of cis- or trans-disubstituted epoxides. Using that method, identify what reagents you would use to prepare the following epoxide from acetylene: H" 'Et The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A B C D DMP or PCC На, Pt EtBr PHCH2BR E F H H2SO4, H20, HgSO4 МСРВА (RCO3зН) Na, NH3 (/) H2, Lindlar's cat. I K TSCI, py PhBr NANH2 1) EtMgBr; 2) H30+arrow_forward8. (a) Benzene derivatives exhibit medium to strong absorption in UV-region. Explain why aniline and phenoxide ion have strong UV-absorptions.arrow_forwardWrite structural formulas for the cyclohexadienyl cations formed from aniline (C6H5NH2) during(a) Ortho bromination (four resonance structures)(b) Meta bromination (three resonance structures)(c) Para bromination (four resonance structures)arrow_forward
- (a) Give the products of the phosphoric acid-catalyzed dehydration of 2-methylcyclohex-3- enol. Label the three products with major, minor, and trace amounts. OH H3PO4, heat (b) Describe the rule that is applied in the acid-catalyzed dehydration of 2-methylcyclohex-3- enol. Explain your answer based on the products formed.arrow_forwardUsing your reaction roadmap as a guide, show how to convert 1-butanol and ethanol into racemic 2-ethoxy-1-butanol. You must use 1-butanol and ethanol as the source of all carbon atoms in the ether product. (1) (2) (3) OH (4) 2-ethoxy-1-butanol (racemic) OH Suggest reagents and experimental conditions for each step in this synthesis. From the choices provided, suggest appropriate reagents for each step. More than one reagent may be necessary. Use the minimum number of steps possible. Enter your answer as a letter, or a series of letters, in the order necessary to bring about the steps shown. Reagents: OH (c) ethylene oxide (a) (CH3)3CO¯K+, THF (d) H₂SO4, H₂O (b) OsO4, H₂O2 Br OH + (9) H₂ SO4 (anhydrous) Na, NH3 (1) (k) NBS, heat (e) m-chloroperoxybenzoic acid (mCPBA) (f) pyridinium chlorochromate) PBr3 (PCC) (h) NaOH (N-bromosuccinimide) Previous Nextarrow_forwardExplain the following behaviours :(i) Alcohols are more soluble in water than the hydrocarbons of comparable molecular masses.(ii) Ortho-nitrophenol is more acidic than ortho-methoxyphenol.arrow_forward
- 2B Suggest a short synthetic route for the preparation of compound D from compound C OH Br COOH C D Note: Apart from compound C, you can also use organic reagents with up to 1 C atom. The number of arrows in the figure above does not necessarily correspond to the number of steps.arrow_forwardStarting exactly with any acid chloride with exactly with 5 carbon atoms, and using appropriate reagents outline the synthesis of the following molecules: (a) 2,6-dimethyl-4-heptanone (b) 4-propyl-4-octanolarrow_forwardDescribe the characteristic infrared absorption frequencies that would allow you to distinguish between the following pairs of compounds. (a) cyclohex-2-enone and cyclohex-3-enone (b) cyclohexanol and cyclohexanonearrow_forward
- 7.55 Acid-catalyzed dehydration of 2,2-dimethyl-1-hexanol gave a number of isomeric alkenes including 2- methyl-2-heptene as shown in the following equation. H2SO4 НО heat (a) Write a stepwise mechanism for the formation of 2-methyl-2-heptene, using curved arrows to show the flow of electrons. (b) What other alkenes do you think are formed in this reaction?arrow_forward(c) A series of dialkyl ethers react with excess hydrogen bromide, with the following results. Analyze the ether in each case and write out the complete chemical equations. (1) Ether gives a mixture of bromocyclopentane and 1-bromoethane. (ii) Another ether gives one mole of 1,5-dibromopentane per mole of ether.arrow_forward5.34 Select the compound in each of the following pairs that will be converted to the corresponding alkyl bromide more rapidly on being treated with hydrogen bromide. Explain the reason for your choice. (a) 1-Butanol or 2-butanol (b) 2-Methyl-1-butanol or 2-butanol (c) 2-Methyl-2-butanol or 2-butanol (d) 2-Methylbutane or 2-butanol dovolonentanol or cyclohexanolarrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningGeneral, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningOrganic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,