2. The following molecules do not take part in Diels-Alder reaction, even using extreme heating conditions....
5. This reaction uses water as a solvent to efficiently prepare the Diels-Alder product, even though the reactants and products are not soluble in water. Explain what is meant by "hydrophobic effect" and how it is used in the context of this reaction. You may use the back side of this worksheet to answer the question. (4 pts) IC
5. This reaction uses water as a solvent to efficiently prepare the Diels-Alder product, even though the reactants and products are...
1) synthesis
2) Circle any of the follwoing dienes that can react in a
Diels-Alder reaction and explain why?
Circle any of the following dienes that react in a Diels-Alder reaction and explain why?
Predict the product for the following Diels-Alder
reaction?
1. Predict the product for the following Diels-Alder reaction. COCH3 COCH3 CCH3 OCH3 OCH3 IV A) I B) II C) III IV E) None of these
(2) Diels-Alder reactions of a diene with a dienophile are known to undergo a concerted reaction. However, 2,3-Di- tert-1,3-butadene does not undergo Diels-Aider reactions. Explain 2,3-di-tert-1,3-butadiene (4) Propose mechanisms for the following steps 1 and 2. Slep 1 Step 2 Bry Br NaBH CH acetic acid (I) Using> as a symbol, rank the following alkyl bromides in order of decreasing reactivity. (6 pts) Br Cн,Br -Br (a) For hydrolysis by an Sy1 mechanism (b) For hydrolysis by an S,2 mechanism...
3) Explain why the following compound does not act as a diene in a Diels-Alder reaction: (4 pts)
1.Calculate the value of the percent atom economy for each Diels
Alder reaction:
2. In the Diels Alder reaction a cyclohexene is created by the
combination of a diene and dienophile.
How many pi bonds are made in the Diels Alder reacion?
How many sigma bonds are made in Diels Alder reacion?
How many pi bonds are destroyed (changed) in the Diels Alder
reaction?
Reaction 1&2 sillo Reaction 3&4 - oi d. por lo Reaction 5&6
QUESTION 12 Exhibit 14-4 The following molecules may be prepared using the Diels-Alder reactions. Write the structures of the starting diene and dienophile necessary to prepare cach molecule and label them. - 1 m i
3. For the following Diels-Alder reaction between cyclopentadiene and methyl methacrylate: LABEL the observed products as either exo or endo and CIRCLE the major product (3 pts) Me CO2Me CO2Me heat CO2Me
3. For the following Diels-Alder reaction between cyclopentadiene and methyl methacrylate: LABEL the observed products as either exo or endo and CIRCLE the major product (3 pts) Me CO2Me CO2Me heat CO2Me
Post- Laboratory Questions: 1. Draw the product of the following Diels-Alder reactions 2. What starting materials would be used to prepare the following compound by the Diels- Alder reaction? 3. Cyclopentadiene dimerizes easily. Before using cyclopentadiene in a reaction, it is necessary to crack the diene. Draw the Diels-Alder reaction for the dimerization of cyclopentadiene. 4. What are the products of the following Diels-Alder reactions? Show the stereochemistry where applicable
predict the product
Predict the product for the following Diels-Alder reaction. Do not show stereochemistry in your answer. C) 0 Excess CO 0