(b) Visualise the retrosynthesis for the (as following instructed) (i) (ti) PH target compounds along with synthesis: (Naphthalene has to be one of the equivalent reagents) OH OH (1,3-di X disconnection has to be followed)
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do i and iii both retro and forward rxn in detail
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- Arrange the following three chlorides in decreasing order towards Sy1 reactivity. N' (1) (2) (3) ČI ČI (b) 2 > 3 > 1 (d) 3 > 2 > 1 (a) 1 > 2 > 3 (c) 2 > 1 > 3GINE REASONABLE SYNTJE SËS OF THE INDICATED PeoDuCTS FROM THE GIVEN STARTING MATERIALS, Snow STERE OCHE M - ISTRY WHERE IT IS RELEVANT (*), AND SHOW ANY INTER - MEDIATES THAT COULD BE O THER REAGENTS You DEE M FIT, AS LONG A5 THHE-i MAKE CHEMICAL SENSE ARE STABLE ENOUGH TO EXIST, ISOLATED. You MAY usE ANí Ph4G. 4G 7:41 PM 27 4. Draw structures corresponding to the following names: (a) 2,2-Dimethylpropanoyl chloride (c) 5,5-Dimethylhexanenitrile (e) trans-2-Methylcyclohexanecarboxamide (f p-Methylbenzoic anhydride (b) N-Methylbenzamide (d) tert-Butyl butanoate
- Which of the following are a major product of the reaction sequence shown belo (1) Br2, FeBr3 (2) Mg/ether он он (A) (B) (3) (4) dil H* /H;O (C) (D) он Compound C Compounds B and D OCompounds A and B Compound DA key step in the synthesis of the narcotic analgesic meperidine (tradename Demerol) is the conversion of phenylacetonitrile to X. (a) What isthe structure of X? (b) What reactions convert X to meperidine ?Which diastereomer A or B gives C. Select between diastereomer A or B. Give the reaction mechanism with suitable explanation.
- When N-bromosuccinimide is added to hex-1-ene in CCl4 and a sunlamp is shone on themixture, three products result.(a) Give the structures of these three products.(b) Propose a mechanism that accounts for the formation of these three productsa) Consider the reaction scheme below. -[•] PhLi HONH,, HCI A ELOH B D (i) Deduce the structures of compounds A, D and intermediate C. (ii) Outline the mechanism for the conversion of A to B.3. (a) The 3C-NMR spectrum of one of the three xylenes (dimethyl benzenes) show resonance at 8 = 10 1, 126-2, 130-0 and 138-8 ppm (proton deccupled). ident:fv the structure of the xylene and ass:gn %3D the &-values.
- Chemistry 3. Complete the following reaction scheme. Give all product(s) and indicate major or minor and any relevant stereochemistry. (а) NaOEt heat (b) heat (c) Br NaCN DMF (d) (e) OH H,SO,/H,PO, heat (f) HBr (g) 1) BH. THE 2) H,0, OH (h) 1) Hg(OAC), H-0 2) NaBH, (i) KMNO, NaOH ColdWhich reaction below give a par of diastereomers and Why?Electrostatic potential maps of anisole and thioanisole are shown. Which do you think is the stronger acid, p-methoxybenzoic acid or p-(methylthio)benzoic acid? Explain.