Which approach is SAFEST for the synthesis of the following ester: ། ཚི a. ii C. + CH₂OH b. H₁₂O+ OH + CH₂OH A CI + CH₂OH d. OA OB OD + CH3CH2CH2OH
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- 19. Which of the following compounds has the LOWEST solubility in water at 25 °C? a) CH;CH;CH;OH b) CH-CH:CH:CH.ОН c) CH3CH2CH2CH;CH2OH d) same solubility for all1. NaOEt CO₂Et 2. H3O+ 3. heat Br H3C CO₂H CO2 H3C CO₂Et The malonic ester synthesis is a carbonyl alkylation reaction. It is used to prepare carboxylic acids from primary alkyl halides, lengthening the carbon chain by two atoms. Thus, the product can be visualized as being a "substituted acetic acid." The reaction consists of three steps: generation of the enolate anion followed by SN2 reaction with a primary alkyl halide, ester hydrolysis under acid conditions, and decarboxylation. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions 22 CX EtO₂C EtO₂C HOCH2CH3 HOCH2CH3 EtO₂C EtO₂CClaisen condensation between diethyl phthalate and ethyl acetate followed by saponifi- cation, acidification, and decarboxylation forms a diketone, C,H,O,. COOEt 1. EtO Na+ HCI, H,O B NaOH, H,O + CH3COOEt C,H,O2 2. НС, Н,О heat heat COOEt Diethyl phthalate Ethyl acetate Propose structural formulas for compounds A and B and the diketone.
- identify the product formed in the following S№² reaction: § 2 OH A. Br H₂0 Br acetone میں B. سه C. OH ||| D. OHOPh OPh D CI Br N E N Но o-SiMeg OH OPh OPh F NH2 Но N Но OH OH A V ( Choose ] Bu4N+ F- МСРВА (Ваyer villager) Mg, then CO2 (Kobe!!!!) NH3 (SNAR) H2S04, Heat (Fisher esterification) 03, DMS (ozonalysis) Choose (Choose ) E [ Choose ) F [ Choose ) B.1. NaOEt CO₂Et 2. H3O+ 3. heat Br H3C H₁C CO₂Et CO₂H CO2 + EtOH The malonic ester synthesis is a carbonyl alkylation reaction. It is used to prepare carboxylic acids from primary alkyl halides, lengthening the carbon chain by two atoms. Thus, the product can be visualized as being a "substituted acetic acid." The reaction consists of three steps: generation of the enolate anion followed by SN2 reaction with a primary alkyl halide, ester hydrolysis under acid conditions, and decarboxylation. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions EtO₂C X ¯:0: :0: Br: EtO₂C. Br CH3 H3C CH3 CH3 56
- Which of the following compounds is an anhydride? I. II. III. II CH3CO CH3C- CH3COH III IV V 2=01 IV. V. || CH3COOH 0 0 CH3COCCH3Acetal and Hemiacetal formation: c. Acetal/hemiacetal CH 3 ty CH H3C [ a. hemiacetal H3C d. Cyclic hemiacetal Gyertych OH Esterification/Amidation: e. Fisher esterification OH + CH₂OH + H3C CH3 H OH + CH3OH H [H*] H₂SO4 H™ a. hemiacetal b.acetal + H₂O0 1 eq. NaOH O excess H₂O H2SO4 catalytic
- What is the major organic product obtained from the following reaction? రజారు రరర HO 1. (CHCULI 2 H30* Oa 1 b.2 : 3What is the pH of the sodium lactate solution? C3H5O3 + H₂O HC3H5O3 + OH- [C3H5O3] = 3.22 x 10-¹ M Ka(HC3H503) = 1.38 x 10-4 pH = [?] pH of NaC₂H₂O Enteracetone H3C, HO H3C OH The product of the following reaction is: A OH H3C OH C D OB
