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- The following reaction produces multiple hydration products, all with the same regiochemistry but with different stereochemistry. How many unique products does this reaction make? O 2 04 0 6 08 H3O+ ?HCI CH-CH, CHCI Show the mechanism step by step to obtain the product NAOH HO, Cl 10) Show the mechanism using step by step to obtain the productWhich is the major product from the acid catalyzed hydrolysis of cyclohexene oxide? но OH но он || II IV
- What is the mechanism of the following reaction? EN : Nu Nu №₂ A two-step mechanism involving the formation of a benzyne intermediate A multistep mechanism involving bonding of nucleophile to -N: (+), followed by rearrangement, then loss of N₂ leaving group. CI A two-step process, where a 6-member ring carbanion intermediate is formed in first step. followed by ejection of CI(-) in second step. O S2 mechanism, where Nu:(-) replaces-N₂ leaving group in a single step O An S1 mechanism in which the diazonium ion forms a phenyl cation in the first step (N, is leaving group), followed by attachment of Nu:(-) to the benzene ring.The third part of the synthesis is occurring on P=O, which has a similar reactivity as C=O. NO2 HN-P-O Pho CI CI но 10 Ph NH2 11 NO2 4a. Propose a synthesis of racemic 9. For each step, the reactant, condition and product must be clearly shown. No mechanism is required. The reagents are limited to: Any organic compound with one/two/three carbon(s) AND one functional group; Any inorganic reagent, such as H20, HCI, NH3, KCN, CO2 etc.; Any non-building block, such as acid, base, catalyst, protection reagent, redox reagent and solvent. Organic compound with 1/2/3 carbon(s) AND one functional group Inorganic reagent Non-building block NH; racemic 9 4b. Draw the structure of compound 10.Elimination reactions of cis-and trans-1-bromo-2-methylcyclohexanes with NaOEt in E1OH can give the same or different main product, 1-methylcyclohexene (1) or 3-methylcyclohexene (2). Which of (a)-(d) indicates the main products? Br Br NaOEt NaOEt ELOH ELOH Me `Me Me Me cis 1 2 trans A. 1 both from the cis and trans substrate B. 2 both from the cis and trans substrates C. 1 from the cis and 2 from the trans substrate D. 2 from the cis and 1 from the trans substrate
- Q6. Propose a mechanism for the following reaction: Br CH3O + Br2) Predict the product(s) for the following reactions. O C6H5CCH3 + CH₂=CHCC6H5 O + (CH3)₂C=CHCH LDA, THE NaOH, H₂OIdentify the reagents needed for the given reaction. -c-CH3 || Ĉ-CH3 || ċ-CH2B1 Select one: HBr О НBr O Br2, H20 O Br2, hv O Br2, OH
- 13. On treatment with nitrous acid (HNO2) these 4 isomers of 1 react differently. (a) Draw a mechanism for the reaction of each stereoisomer, and hence identify which stereoisomer gives which product A, B or C. (b) Draw the orbital interactions involved in the product-determining step for each reaction. A H B C To get you started: OH OH HNO2 1 NH2 NENH3C N- H₂NNH₂ H⭑ CH3 H3C IN CH3 Hydrazine reacts with 2,4-pentanedione to yield 3,5-dimethylpyrazole. Including protonations and deprotonations, the reaction takes 12 steps. Write out the mechanism on a sheet of paper and then draw the structure of the product of step 6. • You do not have to consider stereochemistry. •You do not have to explicitly draw H atoms. • Do not include lone pairs in your answer. They will not be considered in the grading. • In an elimination step, include the structure of the leaving group, but draw it in its own sketcher. Separate structures with + signs from the drop-down menu. ? Sn th Previous NextWhat is the major product from this reaction (including stereochemistry if relevant)? OH Compound O Compound P Compound Q Compound R HO P OH BH 3 THF THF; NaOH, H₂O2 H₂O Q OH ?? I R OH