18. Give the reagents and reaction conditions for the following conversion, CH,CH;COCI CH;CH;CH2OH A LIAIH/dry ether B H/Pd, BaSO. C H/K;Cr2O D Sn/Conc HCI
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- The following reactions are unlikely to provide the indicated product in high yield. What is wrong with each?d. Reaction with CH3MgI (excess), ether; then H+/H2O e. Reaction with LiAlH4, ether; then H+/H2O f. Reaction with DIBAL (diisobutylaluminum hydride), toluene, low temperature; then H+/H2Ow how enols, enolate ions, andenamines act as nucleophiles. Predictthe products of their reactions withhalogens, alkyl halides, and otherelectrophiles. Show how they areuseful in synthesis.
- Reaction of 2-methyl-2-pentene with reagent is regioselective. Draw a structural formula for the product of reaction and account for the observed regioselectivity. Q.) H2O in the presence of H2SO4Reaction of 2-methyl-2-pentene with reagent is regioselective. Draw a structural formula for the product of reaction and account for the observed regioselectivity. Q.) Br2 in H2ODraw all of the substitution and elimination products formed from thegiven alkyl halide with each reagent: (a) CH3OH; (b) KOH. Indicate thestereochemistry around the stereogenic centers present in the products,as well as the mechanism by which each product is formed.
- cis-4-Bromocyclohexanol and trans-4-bromocyclohexanol form the same elimination product but a different substitution product when they reactwith HO-. a. Why do they form the same elimination product?b. Explain, by showing the mechanisms, why different substitution products are obtained.c. How many stereoisomers does each of the elimination and substitution reactions form?A chemist allows some pure (2S,3R)-3-bromo-2,3-diphenylpentane to react with a solution of sodium ethoxide(NaOCH2CH3) in ethanol. The products are two alkenes: A (cis-trans mixture) and B, a single pure isomer. Under thesame conditions, the reaction of (2S,3S)-3-bromo-2,3-diphenylpentane gives two alkenes, A (cis-trans mixture) and C.Upon catalytic hydrogenation, all three of these alkenes (A, B, and C) give 2,3-diphenylpentane. Determine the structuresof A, B, and C; give equations for their formation; and explain the stereospecificity of these reactionsSuggest a structure for the major product H of the following cycloaddition reaction between 10 and 11, and comment on any relevant stereochemical control can u show curly arrow mechanism from the basics detailed thank you