Choose the most appropriate reagent(s) for the first step of the synthesis. H reagent(s) H2SO4, heat B 1. 03 2. CH3SCH PCC, CH2Cl2 Na2Cr2O7, H2SO4, H₂O OH OH CNaBH4, CH,OH OH

Please identify the reagents used in the synthetic scheme shown below. You should choose reagents that accomplish the reactions and do not result in undesired side reactions. You may use a 1-carbon reagent. Please briefly explain the reasoning for your choice of reagent 1 in the first synthesis step.

Identify the major product of the following reaction sequence. 1) [H*], H₂NNH2, (-H₂O) 2) KOH/H₂O, heat HO₂C HO₂C HO CO,H OH OH There is no reaction under these conditions or the correct product is not listed here.

A(C3H₂O) 1)Mg 2)C6H5COMе HBr BrCH2–CH2–CHO OH Me C O O HOCH₂ CH₂OH H3O* B(CH₂O₂Br) Producto final

Consider the reaction scheme below. (i) H3COCHN CO₂Et A H₂N OH EtO OEt B C6H₁1 NO2 base Ha Identify the reagent(s) and conditions A and the intermediate B in this reaction scheme.

Which of the following reagents will result in the following reaction occurring? O H+/H₂O/Heat H₂O OH-/H₂O/Heat LIAIH4 O ZI O OH + H3N

Select the correct reagent(s) for each step of the synthesis as shown below. [1] Cl [2] [4] Cl. NO, 2 00 Th P [3] E Step [1] ONH,NH, and HỌ ●CH3CH2COCI, AICI OH₂O2, OH OC₁₂, FeCl3 NO₂ Step [2] OHNO3, H2SO4 O HCI, peroxides Cl₂, FeCl3 OH₂, Pd-C Step [3] NH₂NH2 and HO NO, 2 O CH3CH2CH2Cl, AlCl3 ○ Cl₂, FeCl3 O HCI, peroxides Step [4] HCl, peroxides OCH,CH,COCI, AICI₂ ONH,NH, and HO O CH3CH2CH2CI, AICI Try one last time

SECTION 6: Show the mechanism of each reactions with arrows and intermediates form as in a. b. C. HBr Br₂ Cl₂, H₂O Br Br CI Br OH

For the reaction shown, select all suitable reagents: OH DMP CH₂Cl2 Na₂Cr₂O7, H₂SO4 H₂O PCC, CH₂Cl₂ CrO₂, H₂O, H₂CC(O)CH₂ DMSO, C₂O₂Cl₂ OH

3. Identify the products (A-G) of each reaction sequence shown below OH 1) HCI 2) KCN E Br NaOCH 3, CH3OH 1) PCC 2) CH3MgCl 3) H3O+ 4) CrO3, H₂SO4, H₂O 1) LDA, THF, -78 °C 2) CH31 A (C7H12O) C (C4H8O) F (C5H₂N) 1) Br₂, H* (cat.) 2) Li₂CO3, LiBr, DMF 1) LDA, THF, -78 °C 2) CH3CH₂CI 1) LDA, THF, -78 °C 2) CH3CH₂Br ¹H NMR: 6 6.7 (t, 1H); 2.4 (t, 2H); 2.3 (q, 2H);| 2.1 (s, 3H); 1.9 (quint., 2H) 13C NMR: 8 198; 144; 142; 36; 33; 27; 23. D B ¹H NMR: 8 2.5 (q, 2H); 2.4 (t, 2H); 1.6 (sextet, 2H); 1.1 (t, 3H); 0.90 (t, 3H) 13C NMR: 8 210; 45; 36; 18; 14; 8. G (C7H13N)