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- 3) Please draw the structures that correspond to omitted structure for each of the following synthetic sequences. HO Cro3 Cro3 (a) Product `OH Product H,0 HO PCC Cl РСС (b) Product (e) Product OH HO РСС NABHA (f) Starting Material (c) Product OH ELOHMulti-step synthesis. Give the reagents over the arrows and the intermediates between thearrows that are required to synthesize the product compound on the left from the reactant givenon the right for each retrosynthetic analysis.1). Fill in the missing intermediates and product in the following mult-step synthesis:
- Provide a complete mechanism for this reaction sequence он 1. CrOg, pyridine c) Ph `CH3 2. EtMgBrSelect correct pathway to prepare the target carboxylic acid below. Но HO Oa. 1) H2SO4/heat, 2) KMNO4/ H20, H3O", heat Ob. 1) Ag20, 2) H30+ 1) NaCN, 2) H3O+ 1) SOC2, 2) Mg/Et2O, 3) H;O+ d.2) After each reaction arrow, draw the structure of the expected major organic product(s). (A) 1) Ph3P MeO. Br 2) pentanal, K½CO3, 18-crown-6
- According to the text, for each pinacol rearrangement below, followed by alkaline degradation, which major product pair will be formed? Pair A Pair B Ph Ph OH Ph = Phenyl OH OH OH -Ph Ph -Ph OH OH Ph I2 CH3CO₂H Ph (CH2OH)2 KOH ? Choose... 수 -Ph DECOH CH,COH KOH (CH2OH)2 ? Choose... 수Which of the following is a major product of the reaction sequence shown in the box? CH3CO₂H А) C) 1) CH3OH (excess), H+, heat 2) 2CH3MgBr; 3) H2O, HCI ОН то ОН B) D) 0 ? ОНComplete the reaction below. 1) What are the names of the starting compound and product? 2) Draw out a COMPLETE mechanism and be sure to use arrows and appropriate charges. Но на илон ля Sulfuric Acid, ???
- Design a synthetic pathway for the following transformation. Provide the reagents and products for each step. More than one step is required. OH ОН .... НОClick the "draw structure" button to launch the drawing utility, and be sure to answer all parts. Hint Devise a synthesis of the epoxide B from alcohol A. Solution OH Guided Solu A (Hint: Determine what alkene is needed to make the epoxide, and begin the synthesis with a reaction that yields the needed alkene from an elimination reaction.) [1] draw structure ... [2] J [3] 8 of 10(3) Mechanism. Provide the mechanism for the following reaction. HO OH Он |-0 HO Он NaOH, Н2О но HO Он HO Он