Now it's your turn to practice retrosynthesis and forward synthesis using the reactions from Ch. 7 and Ch. 8. Please answer the following questions by filling in the space with either a synthetic intermediate or final product. 1. Please draw the retrosynthetic analysis by drawing the immediate precursors to the final product. Please only use transformations found in the alkenes and alkynes chapter. one
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- Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product structures, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s). Be sure to account for all bond-breaking and bond-making steps. Then draw the organic product of the reaction. Include all lone pairs in the structures. Ignore inorganic byproducts and + counterions. Drawing Arrows NaNH2 Select to Draw Product H H I I O:Z: + S :O: H Undo H Na+ EP ResetCurved arrows are used to illustrate the flow of electrons. Use the reaction conditions provided and follow the curved arrows to draw the products of the following reaction or mechanistic step(s). Include all lone pairs and charges as appropriate. Ignore inorganic byproducts. H3C. H3C CH3 H₂O Drawing .CH3. Devise a synthesis of each product from the given starting material, using any necessary organic or inorganic reagents. Write your answer in the blank space .d) tert-butyl chloride from 1-iodo-2-methylpropanee) 2-bromocyclohexanol from chlorocyclohexanef) trans-1,2-dibromocyclopentane from cyclopentan
- Construct a three-step synthesis of trans-2-pentene from acetylene by dragging the appropriate formulas into the bins. Note that each bin will hold only one item, and not all of the given reagents or structures will be used. (Me methyl, CHs; Et ethyl, CH3CH2.) Reactant Product Reagent 1 Reagent 2 Step 1 Product Step 2 Product Reagent 3 (acetylene) (trans-2-pentene) Li HBr На Pt 1) NaNH2 2) Me н CH3CH2NH2 H H 1) NaNH2 2) EtBrCurved arrows are used to illustrate the flow of electrons. Using the provided starting and product structures, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s). Be sure to account for all bond-breaking and bond-making steps. Then draw the organic product of the reaction. Include all lone pairs in the structures. Ignore inorganic byproducts and counterions. HH Select to Add Arrows A HCIComplete the mechanism for the reaction of butanone with NaBH, followed by the addition of aqueous acid. 1. NABH4 final product 2. H3O* Step 1: draw curved arrows. Step 2: Draw the charged organic intermediate product. Include nonbonding electrons and charges. Omit the counterion. :0 : H,0* H -- B - H Na + H.
- Curved arrows are used to illustrate the flow of electrons. Using the provided starting structure, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s). Be sure to account for all bond-breaking and bond-making steps. Then draw the organic product of this reaction. Include all lone pairs in the structures. Ignore inorganic byproducts, counterions, and solvents. I I I I I I I I I 1 I 1 I 1 1 H xx :Br: ‚H Select to Add Arrows KOH heat Select to Draw Product KO 0:0-The following reaction conditions gives a mixture of two addition products A and B shown below. CI. HCI Ph Ph Ph Ph Ph A B via rearrangement via rearrangement >Draw< a clear mechanism using electron-flow arrows showing the formation of both products (A and B) from the starting materials. Transition states are not required and ignore the stereochemistry in this question. Do not use any other compounds in your answer except those given. Note that this is not a synthesis question. OYork rk.Unesk 02010. Explain the reaction shown below. Include the following pieces in your explanation. Identify the electrophile and the nucleophile. Draw a curved arrow mechanism for this reaction. (Assume an acidic work-up). Explain the electron flow. Indicate any regiochemical or stereochemical preferences. one b. c. d. LIAIH4 OH one
- Curved arrows are used to illustrate the flow of electrons. Using the provided starting structure, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s). Be sure to account for all bond-breaking and bond-making steps. Then draw the organic product of this reaction. Include all lone pairs in the structures. Ignore inorganic byproducts and counterions. Select to Add Arrows NaCN THF Select to Draw Product NaⒸCurved arrows are used to illustrate the flow of electrons. Using the provided starting structure, draw the curved electron-pushing arrows for the following reaction or mechanistic steps. Be sure to account for all bond-breaking and bond-making steps. Then draw the organic product of this reaction. Include all lone pairs in the structures. Ignore inorganic byproducts and counterions. H. H H H H H H Select to Add Arrows CH3CH2ONa Select to Draw Product Na ⒸCurved arrows are used to illustrate the flow of electrons. Using the provided starting structure, draw the curved electron-pushing arrows for the following reaction or mechanistic steps. Be sure to account for all bond-breaking and bond-making steps. Then draw the organic product of this reaction. Include all lone pairs in the structures. Ignore inorganic byproducts and counterions. HH HH HH HH Select to Add Arrows KO C6H5OK Draw the product of an SN2 reaction shown below. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, Ignore inorganic byproducts. CH3I O Li DMSO Q Please select a drawing or reagent from the question area Atoms, Bonds and Rings Draw or tap a new bond to see suggestions. Charges ↓ B Undo Reset Remove Done Drag To Pan +1