SA) which of the following nucleophiles would be the most likely to be selective for 14-addition (conjugate addition)? OF, CH 30, CH3SH, CH3 Li □ 5B) Give the product of the conjugate addition of the nucleophile selected to 2-Cyclohexenone, with ethanol as solvent. nucleophile ethanol You Just
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- TReferences] Indicate, by letter(s), the position(s) on the ring at which substitution occurs when the aromatic compounds shown undergo bromination with Br, FeBr3 (when necessary). .H CN HO19 Ⓒ) (Care.) 50.3 /H₂ SO4( Oxer) .... ? ← defeck 1₂.0+ / heat B 1 which of the following hatides will not work as electrophile in a Friedel - crafts altylation reaction ? Br Br (1) 1 # Br Jor T TE N19. Provide the major organic product of the following reaction. Be sure to indicate proper regiochemistry and stereochemistry if necessary. HO₂C CO₂H A Sen Actual Size (4
- Identify (label) the electrophile and the nucleophile in the reaction and add curved arrows to the following polar reactions to show the flow of electrons:1. (cont.) CH3 Cl- -CF3 CH;NH2 (i) H ОН ČH,CH3 CH, 1. PBr,/pyridine (j) ОН 2. NaOH/DMSO 2. Using the given starting material and any necessary reagents indicate how the following syntheses can be carried out. ОН CH;CH,CHCH3 CH,CH,CH,COH OH CH;CH,CHCH3 CH;CH,C=CH .OTS OCH3 CH3 CH3 ОН 3. Propose a mechanism that accounts for the formation of the product shown during the following observed reaction. Be sure to show all intermediates. ОН H+Draw the major organic substitution product or products for (2R,3S)-2-bromo-3-methylpentane reacting with the given nucleophile. Clearly drawn the stereochemistry, including a wedged bond, a dashed bond and two in-plane bonds at each stereogenic center. Omit any byproducts. Br CH;CH20 (conc.) H.
- Show a possible mechanism for the following reaction 1) EtMgBr (еxcess) 2) H20 Et OH Me •Me "Et w..Which of the following best describes a key step in the mechanism for the reaction below? HO, ... -CH3 -CH3 + en dihydroxylation H3C- H3C- OH (A) free-radical substitution at the carbonyl carbon B elimination reaction by abstraction of a beta-hydrogen nucleophilic attack by an alkene to form a cyclic (epoxide) intermediate electrophilic addition reaction to form a carbocation intermediatewhich one is more nucleophilic CH3CO2- or -OH? Does it have anything to do with resonance or bulkyness (sterically hindered)??
- Arrange the structure on the image with regard to the reactivity towards nucleophilic acyl substitution 1 being the least and 3 being the mostWhich of the following nucleophiles will NOT do conjugate addition with an a, f-unsaturated ketone? isopropanol CH;CH,NH2 (CH3),CH-MgBr enolate(d) Explain the observed stereo-selectivity in the formation of product using Chelation model. OMe H3CQ Ph. Ph- Zn(BH4)2, CH2CH3 `CH2CH3 H OH THE