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- 4) Draw the complete electron-pushing arrow mechanism for the following reductions. Explain, using resonance contributors, the regiochemistry that results in each case. ỌMe Na, MeOH ? NH3 CHO Na, MeOH ? NH3Q17. Compound 1 can undergo an intramolecular reaction to give cyclic product 2. Using curly arrows, show the mechanism of this reaction – note that the mechanism involves more than one elemental step - and draw the structure of 2; chemical formula is provided as guidance. H2N. C5H9NO CH3OH 2Q17. Compound 1 can undergo an intramolecular reaction to give cyclic product 2. Using curly arrows, show the mechanism of this reaction – note that the mechanism involves more than one elemental step - and draw the structure of 2; chemical formula is provided as guidance. H2N. C5H9NO CH;OH 2
- H. H ÔMe Ph;P LIAIH4 compound a compound b HO. Bombykol C16H300 The above reaction scheme presents one possible synthesis of the compound. Work out the synthesis on a separate sheet of paper, and then draw the structure of compound b. Consider E/Z stereochemistry of alkenes. Do not show stereochemistry in other cases.Q17. Compound 1 can undergo an intramolecular reaction to give cyclic product 2. Using curly arrows, show the mechanism of this reaction – note that the mechanism involves more than one elemental step - and draw the structure of 2; chemical formula is provided as guidance. H,N. CsHgNO + CH;OH 21. a) Write the major products of the following compounds with H+/H₂O b) Write the major products of the following compounds with PH3 followed by H₂O2/-OH =CH₂
- Part A Draw the product formed when the structure shown below undergoes substitution with OH™. Interactive 3D display mode Br H CH3 Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default. Show the appropriate stereochemistry by choosing the dashed or wedged buttons and then clicking a bond on the canvas.N(CH2CH3)3 + HNO3 --------> a.) rewrite the reaction using bond-line structure of reagents and products of the reaction b.) supply the curved arrows explaining the mechanism of the reactionWrite down all possible alkene products from the following Elemination reaction (no mechanism is required) indicate which one will be major product. And explain it?
- Q3. Please provide a curved arrow mechanism that can explain the reaction shown below. i) LDA ii) aq. workup Me Me TBSO CI Q4. a) Identify the main products of the following cycloaddition reactions. In each case, provide a curved arrow mechanism that accounts for their formation. Me OH H Me b) Provide a clear drawing that explains the stereochemistry of the product.Provide the structure of the product(s) with stereochemisty if appropriate. If multiple products indicate major product or if products are formed in equal amounts. If there is no reaction expected explain why. 1. PPH, 2. KOIBU Br 3. H2, Pd/C H3C H,C- 1.O3 2. Me,s 3. HNNH2, KOH, A H3C. „CH3 H* (H,0] H3. Complete the following reaction scheme. Give all product(s) and indicate major or minor and any relevant stereochemistry. OH Br heat -8 IBr heat (c) Br NaCN DMF