1. Fill in the products for the following reaction sequences OH но Cat. HA PCC NH2 CH,Cl2 pH 4-5 Он 1. PPH3 2. RLi PPH3 = Triphenylphosphine = P(CgHs)s
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- The Zeisel method is an old analytical procedure for determining the number of methoxyl groups in a compound. A weighed amount of the compound is heated with concentrated HI, ether cleavage occurs, and the iodomethane product is distilled off and passed into an alcohol solution of AgNO3, where it reacts to form a precipitate of silver iodide. The Agl is then collected and weighed, and the percentage of methoxyl groups in the sample is thereby determined. For example, 1.06 g of vanillin, the material responsible for the characteristic odor of vanilla, yields 1.60 g of Agl. If vanillin has a molecular weight of 152, how many methoxyl groups does it contain?14. a) b) c) Give the major organic product(s) of each of the following reactions. EtO OH OEt CH,CO Et 1. Br₂, PBr3 2. H₂O 1.2 equiv. NaOEt, EtOH 2. Br 1.LDA, THF 2. CH₂CH₂Br BrWhat is(are) the major final product(s) formed during the following sequence of reactions? 01 11 V 1.0₂ 2. (CH₂)₂S C₂H₂O 2 identical molecules ||| =PPhy < IV орна
- 1c. What is the nucleophile in the following reaction? .Br CH;CO0 Na LO OCCH3 NaBr ld. What is the electrophile in the following reaction? Br CH;COO Na L0OCCH3 NaBr +What is the major organic product obtained from the following reaction sequence? OCH CH 1. NaOCH,CH, CH3CH,OH 2. OCH;CH, 3. Н,о" O 4 O 1 O 33- Write the organic product(s) and reaction mechanism a- b- CO₂H H3O heat CO₂CH3 1. NaOCH3 2. (CH3)2CHI 3. aq. NaOH 4. H₂O*, heat
- 5. CH:CH2ONA + CH3CH2BR 15). - + NaBr _(6a)_+ 2CUSO4. + 4NAOH » CH:COOH +(6b) + 2NA2SO4. + H2O 6.Complete the reactions by predicting the product/s: Zn + 2HC1 –→ ZnH2 + Cl2 b. ZnCl2 + H2 C. no reaction a.What is the product of the following reaction sequence? H*, НО ОН 1. ?? OMe 2. excess `MgBr 3. H3O* HO. HO.
- What is the name if the reaction for the synthesis of Benzhydrol? What is the full reaction mechanism? Benzhydrol MgBr 1. ether 2. H*, H₂O OHWrite the stepwise mechanism (structure) of any. two of the following reactions: NaOCH3 Co,CH3 1. CI CH;OH HO NaOCH3 2. CH3OH 3. C-NH он6. Complete the following reaction scheme (g) CH H3C. 1) 9-BBN CH 2) H-О, NaOH (h) H20, H,SO4. HØSO4 (i) 1) BH3 2) H2O,, NaOH