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diels alder reaction Draw a structure for the exo product formed by cyclopentadiene and maleic anhydride....
Draw a structure for the exo product formed by cyclopentadiene and maleic anhydride. Because the exo form is more stable than the endo form, why is the endo product formed almost exclusively in this reaction? In addition to the main product, what are two side reactions that could occur in the preparation of cis-Norbornene-5,6-endo-dicarboxylic anhydride from cyclopentadiene and maleic acid in the presence of ethyl acetate and ligroin?
The Diels-Alder reaction you will conduct in this experiment is between cyclopentadiene and maleic anhydride (the anhydride of cis-2-butendioic acid): diene dienophile The glassware is predried and a drying tube is used to prevent the hydrolysis of maleic anhydride to maleic acid (cis-2-butendioic acid): On heating, maleic acid isomerizes to fumaric acid (trans-2-butendioic acid). Show the mixture of products that would be formed if a small amount of moisture was present in the Diels-Alder reaction you have performed.
a) a-phellandrene combined with Maleic Anhydride (diels-alder) followed by NaOH produces one product. Treating with NaOCH3, followed by an acidic workup produces a new product. What is it's structure and why is not a good derivative to use to characterize the Diels-Alder product? b) Toluene in used as a solvent in these Diels-Alder reactions. Draw the Aiels-alder products from the reaction of toluene and maleic anhydride. Why is this product not formed during traditional Diels-Alder reactions?
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
EXPERIMENT 2A DIELS-ALDER REACTION OF ANTHRACENE REFERENCES Pavia et al (4/e): Tech. 6.1/6.2, 7.2-7.4 Klein (1/e) pp. 784-792 EQUATION heat Diels-Alder Adduct 9,30-dihydroanthracene-9,10- endo-o B-seccinic anhydride mp 262264 PROCEDURE Place 0.200 grams of anthracene and an equal molar amount of maleic anhydride in 5 mL of xylenes in a 10-mL round-bottom flask with a magnetic stir bar. Attach a water-cooled condenser and reflux for 60 minutes. Allow the solution to cool to room temperature and then place the flask in...
Reaction is Diels-Alder Reaction: 0.6 g (Anthracene) + 0.3 g (maleic anhydride) --> product [9,10-dihydroanthreceno-9,10-endo- α, β-succinic anhydride] 0.70 grams obtained. When vacuumed, xylened and isolated, the product yielded 0.70 grams product. Please show how to calculate % yield with the weights above (Theoretical + Actual).
Questions 1. In Diels-Alder reactions, furan and maleic anhydride react quickly, while furan and 1 pentene react very slowly. Why might this be? The reaction between the diene and dienophile shown below gives the endo product. Show both the transition state and the product of the reaction 2. CN CN
What is the complete Infrared Spectrum of 9,10-dihydroanthracene-9,10-α,β-succinic anhydride, in the diels-alder reaction of Anthracene With Maleic Anhydride?
Write the diels-alder product (including correct conformation) and maleic anhydride
Diels-alder reaction lab Reaction: anthracene+ maleic anhydride <---> 9,10-Dihydroanthracene-9,10-α,β-succinic acid anhydride How would raising the temperature of the experiment affect product isolation? Would more or less product be expected, and why?