Question 17 Predict the expected product for each reaction and provide IUPAC name for the correct reagent used to yield the desired epoxide: A 1 NAME B Br Br Box 1 (name): OH Box 2: 2 HBr ? Br с OH a OH D Br OH
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- The key step in a reported laboratory synthesis of sativene, a hydrocarbon isolated from the mold Helminthosporium sativum, involves the following base treatment of a keto tosylate. What kind of reaction is occurring? How would you complete the synthesis?Question 19 Predict the expected product for each reaction and provide IUPAC name for the correct starting material to yield the desired epoxide: OH ° 1 NAME A B с 2 H2SO4 ? EtOH D Eto, OH OEt Но, HO EtO HO. EtO Box 1 (name): Box 2:Identify the suitable reagents for the given reaction and arrange them accordingly. OH A+&+F OEt 1 2 OEt OEt 1) EtOH, H₂SO4; 2) EtOH, H₂SO4 1) EtONa followed by H₂O; 2) TsCl/py followed by EtONa 1) EtONa followed by H₂O; 2) NaH followed by EtBr O 1) EtOH, H₂SO4; 2) NaH followed by EtBr O 1) EtOH, H₂SO4; 2) TsCmy followed by EtONa
- Determine the reagents required for the following syntheses. More than one reaction is likely required. a) b) c) d) OH OH olm NH₂ MeO NHMe Me. Me OH OHAmong the choices shown, which reagents would lead to 3-pentanone from bromoethane? Al 1 Li Cul 2) C13CH2OTS | BI1 NECNn DMSO 2) CH3CH2M;Br 3)H2O C)CH13CH2-CO CI D CH3CH2-CO OCH2CI13What is the major organic product obtained from the following reaction? H₂Cr₂O7 H₂SO4, H₂O OH A) 1-butene, CH3CH2CH-CH₂ B) butanal, CH3CH₂CH₂CHO C) butanone, CH3CH₂COCH3 D) butanoic acid, CH3CH2₂CH₂COOH
- 3) Propose a step-by-step mechanism for the following nucleophilic substitution reaction: (You need to show all bonds, atoms and arrows involved in the mechanism reactions) LOCH CH;OH Br ÓCH,N 3 5 Predicate the products of each reaction: Aldehydes + Ketones CH₂-C-OCH, CH;CH + HC=N =O + H₂NCH₂ OH O + H₂O H H₂SO4 HgSO4 2 H₂ Ni NaCN + NaBH₂ H+ Zn (Hg), HCI4) Eto ₂ 5) 2-Cyclohexene-1-one O₂Et + ethylace to acetate NaOEt NaOEt
- Answer the following questions from the reaction given below: OH OH 1) BH3-THF 2) NAOH/H2O2 OH C a) What is the major product(s) of the reaction (A-D) ? b) What is the mechanism by which the major product is formed ? c) Is the reaction Regioselective ? Explain DI A.Aromatic substitution reactions occur by addition of an electrophile such as Br+ to an aromatic ring to yield an allylic carbocation intermediate, followed by loss of H+. Show the structure of the intermediate formed by reaction of benzene with Br+.What starting materials are needed to synthesize each azo compounds O2N H2N- -N=N- CI но -N=N- -CH3 I0 Fill in the reagent or starting material needed or product in each reaction a) CgH;CH;CH;CH2Br CGH;CH;CH;CH¿NH2 b) C,H;CH;CH;CH2CONH, CH,CH;CH;CH;NH2 HCI P-CH;C,H4NH2 NANO2 P-CH;C,H&NH2 HCI/H;0 P-CH3C,H4NH2 CH;COCI