Provide the products for the reactions shown below. Suggest a reasonable mechanism (show electron flow or provide a brief explanation) to account for each step, paying attention to stereochemical details. (a) OBn 1. EtO)2CO, NaOEt 2. H* 3. H₂O*, heat 1. NaH, THF 2. Br, THF
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- 2c. Provide the structure of the major products in the following reactions. (i) (ii) OCH OCH, Draw step by step product and final organic product in the following 2d. (. reaction sequence 1) Mg, diethyl ether Br 2) 3) H,0 4) Na,Cr,O,, H,SO, H20а) Consider the reaction scheme below. PhLi HONH,, HCI A ELOH B (i) Deduce the structures of compounds A, D and intermediate C. (ii) Outline the mechanism for the conversion of A to B. b) Pyrrole and indole both react with the reagents shown below to give compounds E and F respectively. Reagents: POC13, NazCO3, H2O N. E F (i) (ii) (iii) Show how the electrophile is generated. Account for the regioselectivity observed. Complete the mechanism for the formation of compound F.(b) Paying attention to regio- and stereochemistry, predict the major product you would expect from the following reaction. 1. NaOEt, HOEt, heat 2. BH3 THF 3. H₂O₂, NaOH ?
- Chemistry 3. Complete the following reaction scheme. Give all product(s) and indicate major or minor and any relevant stereochemistry. (а) NaOEt heat (b) heat (c) Br NaCN DMF (d) (e) OH H,SO,/H,PO, heat (f) HBr (g) 1) BH. THE 2) H,0, OH (h) 1) Hg(OAC), H-0 2) NaBH, (i) KMNO, NaOH ColdGive the mechanism and products for each reaction below.Chemistry 3. Provide reagents/conditions to accomplish the following syntheses. Several steps are required in some cases. (c) (d) H2N. NH2 но H. NH2 но
- Give the mechanism and product for the reaction below.Q16. What are the necessary reagents to perform the following synthesis? Choose the answer from the options below. DG (0) CH3MgBr/ether (1) NaBH4, (2) H3O*(aq) c) H₂, Pt d) (1) CH3MgBr/ether, (2) H3O*(aq) (ii) dilute HCl(aq) conc. H₂SO4(aq) conc. H₂SO4(aq) conc. H₂SO4(aq)Complete the Reaction below and provide the following (i) a detailed stepwise mechanism to account for the product(s), including all steps involved (ii) Clearly show all the resonance structures and intermediates formed leading to the product. OH acetic anhydride
- Enamines normally react with methyl iodide to give two products: one arising from alkylation at nitrogen and the second arising from alkylation at carbon. For example, Heating the mixture of C-alkylation and N-alkylation products gives only the product from C-alkylation. Propose a mechanism for this isomerization.7. Give the major organic product(s) of the following reactions or sequences of reactions. Show all relevant stereochemistry. (a) OH CO, HSO, H2O, acetone (b) %3| COH 1.LIAIH , ether 2. Но (c) H. 1. NABH4, ethanol 2. Но*7B. (2 reactions (should clearly indicate the stereochemistry). Draw the structure of the product, substrate or condition in the following (a) ОН (b) Ме 1) OsO4 2) NaHSO3 (c) 1) (sia)2BH 2) NaOH/H2O2 H20