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- Draw the mechanism for the following reaction and account for the relative stereochemistry. MeO₂C MeO₂C CO₂Me Pd2(dba)3.CHCI 3 Ph3P, ACOH MeO₂CCyclohexanone do not produce isomeric oximes but cyclohexane does produces 2 stereoisomeric oximes. Explain whyList the following in increasing order of nucleophilic strength. CH3COO-, H2O, CH3O-, OH-, CH3CH20-
- Which of the following molecules will NOT lead to a successful synthesis of a Grignard reagent upon reaction with magnesium? CI https://ibb.co/54Jw34p 2 Me. OMe https://ibb.co/6655LTH Br но https://ibb.co/2nfzPmX O Me `Br https://ibb.co/wo93ymS 2 Br MeO https://ibb.co/Hq2s6ck 2Which statement best describes the stereochemistry of the product?In contrast, optically active butan-2-ol does not racemize on treatment with a solution of KOH. Explain why a reaction like that does not occur?
- Predict the major product(s) for each of the following reactions. Show both enantiomers if a racemic mixture is formed: ? ? 1) RCO₂H 2) H3O+ HBr 1) BH3⚫ THF 2) H2O2, NaOH ? ? H2, Pt Br2 ?Provide the products for the reactions, including the appropriate stereochemistry. 1) O3 i) 2) DMS H2 ii) PdDetermine the major product(s) of the following reaction (disregard stereochemistry): Pentan-3-one reacts with LDA first, then this intermediate reacts with 1-bromo-2-methylpropane Propan-2-one reacts with 1) LDA, then with 2) another propan-2-one followed by 3) hydronium ion
- When norbornene undergoes hydroboration-oxidation, a mixture of two stereoisomers is produced in a roughly 6:1 ratio. (a) Draw both of these isomeric products. (b) Which product is favored? Hint: You should build a model of norbornene and consider the transition state leading to each product. 1. BH3 THF ? 2. H2O2, NaOH, H,O NorborneneDraw the products (including stereoisomers) formed when (S)-2,4-dimethylhex-2-ene is treated with HBr and peroxides under similarconditions.4. Draw the structure of product, substrate or condition in the following reactions (should clearly show the stereochemistry) a) HBr (2 equiv) b) 1) NaNH2 2) Ме 1) OsO4 2) NaHSO3 c) t-BUOK t-BUOH Hint: this is the only product formed