4. Write a complete mechanism for the base-catalyzed ester hydrolysis shown below. Why is the addition of acid required at the end of the reaction? 1. KOH, H₂O, A OMe 2. H3O+ OH
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- Predict the product of the following acetal hydrolysis reactions.10:54 ← Question 21 of 32 Draw the major product of this reaction. Ignore inorganic byproducts. Submit Assume that the water side product is continuously removed to drive the reaction toward products. (CH3)2NH, TSOH Select to Draw | I ITHE MECHANISM: Step 1: In aqueous acid, the first step is proton transfer to the carbon-carbon double bond. H BOH H Hydronium ion RCH₂ R' Conjugate acid of ketone 1-Hexyne draw structure... +RCH= SÖH Enol Step 2: The conjugate acid of the ketone transfers a proton from oxygen to a water molecule, yielding a ketone. ¹H- H + :0: R' H Water H :O: +RCH- H Water 1. R'₂BH 2. H₂O₂, NaOH RCH₂ Ketone R' R' H Conjugate acid of ketone +ÖH + Hexanal H H-O: H Hydronium ion H
- 1. 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 EtO₂CBelow is a three-step synthesis. Provide the missing organic products for each step. Do not add inorganic side-products or minor products. CH3 1. ВНз THF 2. NaOH, H,O2 HBr NaOtBu, HOTBU ? ? ?This is the third of four questions based on the following reaction sequence. What is the major product C from Step 3) in the following reaction sequence? OH 1) H2SO4 2) Св 3) NaH 4) H + D heat OH **** OH -**** OH осо OH ***** OH OH "OH A C
- Provide the mechanism for the following reaction. Eto OEt 1. Na+OEt- 2. PhMgBr 3. H₂O*, heat -CH₂- -OH1. 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 56please answer in text form and in proper format answer with must explanation , calculation for each part and steps clearly