Draw the first intermediates after the pericyclic decarboxylation of 3-oxobutanoic acid with heat.
Draw the first intermediates after the pericyclic decarboxylation of 3-oxobutanoic acid with heat.
This problem describes a decarboxylation reaction. In
the first box, draw curved arrows to show the mechanism of
decarboxylation. In the second box, draw the neutral enol
intermediate that results. In the third box, draw the final product
of the reaction after tautomerization. Do not include lone pairs in
your structures.
Two students are given 3-oxobutanoic acid below and asked to
prepare 2-methyl-3-oxobutanoic acid.
The first student recognizes this as the first step of the
acetoacetic ester synthesis. He treats the starting material with
sodium methoxide followed by methyl iodide. He isolates compound A,
but 1H NMR analysis shows this is not the desired material.
Elemental analysis shows it has the same molecular formula as the
2-methyl-3-oxobutanoic acid. What is compound A?
The second student recognizes an extra step is needed...
Draw the arrow pushing mechanism of decarboxylation of an alpha-keto acid?
Rate based on decarboxylation. Which one undergoes decarboxylation the fastest. 2-hydroxybenzoic acid benzoic acid 4-hydroxybenzoic acid 3-hydroxybenzoic acid
pts) 9. First, exhaustively alkylate, then add Ag20 and heat. After providing ALL intermediates a products, then, name the overall reaction. (Hint: "look left, look right, look top, look bottom." H3C N CH CH,CHI (excess) H
4. (15 Points) Pericyclic Reactions: The transformation below can be described as a pericyclic reaction followed by a polar-acidic mechanism, where the acid is not shown because it is picked up from the environment. (a) Start by redrawing the starting material below, and show how the pericyclic reaction occurs with curved arrows. (b) Specify the type of pericyclic reaction it represents and the name reaction. (c) If you've done the pericyclic reaction correctly, your product will be an enol. From...
Draw the structures of the three intermediates that form in the
acid-catalyzed mechanism in the following reaction.
Draw the structures of the three intermediates that form in the acid-catalyzed mechanism in the following reaction. Attach a jpeg photo of your answers. If we can't see it, we can't grade it. Но он | Học CH-CH-CH oo нс сн, HỌC CHỊ Intermediate 1 Intermediate 2 Intermediate 3 Attach File Browse My Computer Browse Content Collection
H H2C CH₃ 2. Draw the structure of the following compounds. a. 3-methyl-3 phenylbutanal H₂ b. 3-Oxobutanoic acid c. 1,3-Cyclohexanedione 3. Show how you can synthesize the compound below by H3C H3C
HO CHI 2. Draw the structure of the following compounds. a. 3-methyl-3phenylbutanal b. 3-Oxobutanoic acid c. 1,3-Cyclohexanedione 3. Show how you can synthesize the compound below by Witting reaction. HEC HEC
Draw the structures of the three intermediates that form in the
acid-catalyzed mechanism in the following reaction. Attach a jpeg
photo of your answers. If we can't see it, we can't grade it.
нс он HzC CH-CH2OH H3C CHE H2C_CHE Intermediate 1 Intermediate 2 Intermediate 3