4. Propose a synthesis for the transformations shown below (no mechanisms needed, just products/intermediates and reagents). You will get full credit if you figure out two out of three. Clearly indicate which two you want us to grade. Synthesis 1: ? Synthesis 2: Synthesis 3: ? Br Br ? O H
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- Draw a detailed, step-wise mechanism for the reaction shown below. SHOW ALL BOND-FORMING AND BOND-BREAKING STEPS. SHOW ALL INTERMEDIATES. 1) NaOH 2) H3O* H3C H3C HOPropose a synthesis for the transformations shown below (no mechanisms needed, just products/intermediates and reagents). You will get full credit if you figure out two out of three. Clearly indicate which two you want us to grade.1. Show a detailed mechanism for the following reaction. 1. Cl2, NaOH HO. 2. H3O* 1
- Construct a three-step synthesis of 3-bromocyclopentene from cyclopentane. Drag the appropriate items into the bins. Note that each bin should hold only one item, and not all reagents and structures will be used. Reagent 3 Reagent 2 Reagent 1 Final product Reactant Step 1 product Step 2 product (cyclopentane) (3-bromocyclopentene) NBS ROOR HBr HBr ROOR Br Br2 Br2 Hzо hv Br Br Br Br Br (CH3)3CO KX Incorrect. Propose an efficient synthesis for the given transformation. 6-8 This transformation can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A NaH F 1) MeMgBr; 2) H3O+ K dilute H₂SO4 1) B H3O+ G Na, NH3 (1) L DMP or PCC C 1); 2) H3O+ H MCPBA (RCO3H) M SOCI2, pyridine D Mg 1) EtMgBr; 2) H3O+ N EtBr E H₂, Lindlar's cat. J HBr (xs), heat O 1) BH3-THF; 2) H₂O2, NaOH5. The reaction below proceeds through a 4-step mechanism. Classify each step according to the pattem(s) of arrow-pushing (nucleophilic attack, loss of a leaving group, proton transfer, rearrangement). Please provide curved arrows for each step. Pinacol Reaction OH OH Mechanism: Step 1: Step 2: Step 3: Step 4:
- 2. Show how to carry out the following transformation. OMe ? Br Show all required reagents and the product after each step. • You do not have to use curved arrows. • Automatic zero points if any of the following are not adhered to: o You must use the Williamson ether synthesis. o You are not allowed to use any reactions we haven't yet covered.As written, the following synthesis have flaws. Explain what makes the synthesis wrong and do the necessary corrections. 1. CH3COCI, AICI3 2. HNO3, H2SO4 3. H2/Pd NO2Instructions: a,ß-Unsaturated aldehydes and ketones can undergo reaction with nucleophiles at the B carbon, as shown below. Use this information to answer the following question(s). + Nu-H Nu H Refer to instructions. Draw a resonance form for the unsaturated carbonyl that accounts for this reactivity.
- 9. Complete Reactions. Provide only the major product for E2&SN2 reactions. E1/SN1 provide all possible products. NaOH Br provide mechanism CI Provide mechanism + CI NaOCH 3 KCNDraw the product for the substitution reactions below. Then, draw the proper FULL electron-pushing mechanism for the reaction, including intermediates with lone pairs and formal charges, and all electron pushing arrows (SN1 vs SN2). Label the electrophile and nucleophile in each step.Which of the following is an effective way to complete the synthesis below. NH₂ 1) NaOH 2) CH3NH2 1) LDA 2) NaNO3 1) NH3 2) H3O+ 1) HNO3/H₂SO4 2) H₂/Pt/Ethanol (can't reduce ring)