. Terminal alkynes react with Br2 and water to yield bromo ketones. For example: `CH;Br Propose a mechanism for the reaction. To what reaction of alkenes is the process analogous?
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- Functional groups such as alkynes react the same in complex molecules as they do in simpler structures. The following example of alkyne reaction were taken from syntheses carried out in the research group of E. J. Corey at Harvard University. You can assume that the reactions listed involve only the alkyne, not any of the functional groups present in the molecules. Draw the expected products for the following reaction .4. Synthesize the following starting from ethylbenzene. 0lls 02/18/19 41% ehhedrick0507 This is a Molecule Drawing question/Itis worth 1 point/ You have 1 of 3attempts remaining/Thereis n ttempt penalty 13 Question (1 point) e See page 605 Carbenes can add to alkenes to give a cyclopropane derivative. Draw the alkene (unknown X) that reacts with the carbene to give the following product. 3rd attempt VIEW SOLUTION 13/20 7 OF 20 QUESTIONS COMPLETED MacBook Air
- Select the best method to synthesize the following alkene. H2SO4 CH,O Na" В. heat A. CH3OH OH Br CH,CH,CH=P(C,H,), кон D. DMSO (sovent) CH3OH Br O A O B MacBook Pro G Search or type URLIV. Complete the equations for the following reactions. Show all organic alkene products form, mechanism, indicate the major product and the rule Ş(CH3)2 NaSH HEAT OH™ HEATElectron pairs CH3 .. Erase H3C - С — СІ: H3C – S- CH3 CH3 CH, CH3 THF/H,0 + H,C--CH, CH C- CH CHs CH, Use curved arrows to write the first step of this nucleophilic substitution mechanism. :ö: | :ö:
- Which of the following provides a synthetic route to convert 3-iodo-2-methyl-1- butene into 2-methyl-2-butene? 1. NaOH; 2. H₂, Pt 1. H₂, Pt; 2. Br2 1. H₂, Pt; 2. NaOEt 1. H₂, Ni₂B; 2. KOtBu 1. H₂, Pt; 2. KOtBu1. Assign E or Z to the following alkenes. If the alkene does not have stereochemistry, write "NONE". H CI H3C SH T. H CI, ОН H3CH2C НО D D EN C(CH3)3 CH3 Me H Et N' 'N' C=C H3C Et Me what Columbus sought in the 'Indies' - Piperine CH2OH Br (H3C);C, H3C HOH, CH,CF, H3C Br HOH2C НО H the spice Columbus found (Capsaicin) HO. Muscalure Bombykol (the sex attaractant for the male silkworm) (the sex attaractant for the common housefly) OH .CO2H the "heart healthy" part of olive oil a 'less healthy' trans fatty acid from trans fatQ4. Unsaturated carboxylic acid, I, can be prepared in two-steps form aldehyde K. From I, FGI leads to ester J, which then can be disconnected. In the forward sense the preparation of J involves a Wittig reaction. CO₂H J CO₂Et K + Phosphorus ylide (a) How do you convert esters into carboxylic acids (reagent(s), mechanism not required)? (b) Give a retrosynthesis of J leading to the aldehyde K and a phosphorus ylide. (c) Trace your ylide back to triphenyl phosphine and ethyl bromoacetate, giving reaction mechanisms for the forward sequence to give ester J.
- Write the structures for the predicted organic products. In no product is predicted write No RXN. to Н.о а. b. -OH + DİBAI THE CN H,SO4(con) с. d. CH3 H,NNH, CrO3 H;C- H - ОН ОН, Д acetone CH374. When piperidine undergoes the series of reactions shown here, 1,4-pentadiene is obtained as the product. When the four different methyl-substituted piperidines undergo the same series of reactions, each forms a different diene: 1,5-hexadiene; 1,4-pentadiene; 2-methyl-1,4-pentadiene; and 3-methyl-1,4-pentadiene. Which methyl-substituted piperidine forms which diene? 1. еxcess CHз!/К2CO3 2. Ag20, H20 3. Д 1. еxcess CHз!/K2CO3 2. Ag20, H20 CH3NCH,CH,CH;CH=CH2 3. A CH2=CHCH2CH=CH2 || `N' H CH3 1,4-pentadiene piperidineProvide structures of the reactant/products: 1. MgBr 1. KCN a) 2. Нзо" 2. H30* 1. CH;ONa 1. NABH4 2. H30* 2. H30* 6) COOt Na OEt .cOOEt H20* 1. NaOCH2CH3 2. Нао