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- a. b. Propose a mechanism and final product for the following reactions. SiMe3 PhB(OH)2 cat. Pd(PPH3)4 Na₂CO3 S S Ph CO₂Et cat. Pd(OAc)2 K₂CO3, Bu4N+ I- C13H16SSi C15H14O2Splease show the detailed mechanism for each step for the reaction below. OTBDPS Me TMANO (anhydrous) (6 equiv) Co (CO) CH,Cl, -78 °C to r.t. 85% H. Me ОТВОPS triquinaneC. b. d. HN a. 4. Predict-the-Product ). Draw the structure(s) of the major organic product(s) formed in the following reactions. Please indicate stereochemistry where appropriate. NO₂ A ОН LOH NO₂ Br CI CI O NaOH CO₂ (high pressure) H₂O (H* workup) 1. NaCN 2. LiAlH4 (H* workup) H₂, Pd/C NaOH, A sbou bluow
- 6. For each reaction indicate the predominant mechanism: S,1, S,2, E1, or E2. (a) (b) (c) OH H* H* H* ? ? ? A. A OH OH (d) Br (e) .CI NaBr CH,OH DMSO dilute (CH),COK (9) OTs ? OTs (CH),COH Ethanol: For the following reaition ) choo se the organic products that uill be formed and then 2) indicate whether the produts was / were formed via an SNI ,Sw2, E1, E2 mechonism. For elimination realtions, only consider the major alkene. Q1: OH H2 S04 O SO,H possible products : a. d. mechanisms : Q2: Br possible produuts: emultiple) Br a. d. C. mechanisms : LAN 十。 Q3. posible produts : Aloin loax c. ef Jloe s I.k a . mechani sms Q4. Br CH3 NadCH3 CH3 CH3 0H C6HS CH2CH3 ocH3 ocHs C6HS CH3 CH2CH3 H- CH3 posible prodacte R CHs CH3 CH3 CH2 CHs cH3 G. b. d. C. mechanismB. Provide a reasonable mechanism for the non-enzymatic reaction below. :Ö NaOH / H₂O Ö:
- Determine the mechanism of nucleophilic substitution of each reaction and draw the products, including stereochemistr CH₂CH3 CI Br + CN d. + CH3COOH a. acetone + -OCH3 e. DMF f. b. C. ||||| a ||||| Br H Br CH2CH2CH3 + CH3OH DMSO H CH3 CI Br + OCH₂CH3 + CH3CH₂OHSelect the major product for the following reactions Br₂ EtOH A. B. C. D. E. Me e H H + enantiomer Br.. Ber: JBr + enantiomer Asal Br +enantiomer Eto... enantiomer QEt + enantiomer2. Give the mechanism and products for the reaction sequence below: H-Br (1 eq.). -H- 1. Hg(OAc)2 / H2O 2. NaBH4
- What is the MAJOR product of the following reaction sequence? 1) NaOEt, ELOH, heat 2а) ВН,; THF 2b) H2O2, NaOH CI ... + en .... В ... + en SE ... en OH2:31 PM Tue Apr 26 * e C 95%O b. Provide mechanisms and/or products for the following transformations. Pd°Ln, Cul, PHB. 1. HBpin, THF Et,N, THE H 2. Pd°Ln, PhBr, KgPO4, H2O/THF 3. The Mannich reaction can take many forms, including reactions where aromatic heterocycles are employed. Provide mechanisms for the reactions in the following sequence. Me Meo OMe MeN- MeN- H• -N MeN MECN. 100 °C NaH, THF; then 6M HCI Meo,C, Me -Me 4 6.Which conditions will produce the target product in the highest yield? O A) 1. BH3; 2. H₂O₂, NaOH, H₂O B) 1. OsO; 2. S(CH3)2 C) 1. Hg(OAc)₂, H₂O; 2. NaBH4 D) H₂SO4, H₂O A ? B OH racemic mixture