The ratio between the products resulting from the reversible Diels-Alder reaction of furan and N- phenyl maleimide can be tuned by varying the reaction temperature and solvent. Please answer the following questions. A) Draw the products of this reaction that agree with the product ratios at each temperature when run either neat or in ether. Label each product as either endo or exo and be sure to indicate stereochemistry. furan n-phenyl maleimide Time 7 days 7 days 20 days 7 days then 5 h Temp 0 °C ambient ambient 0 °C 60 °C A B 36 49 48 41 68a 23a 43 21 A N-phenyl- maleimide (%) 14 11 ga 36 B) Draw the reaction coordinate diagram of this reaction. Label the products from part A, and provide a drawing of any transition states. B
Reactions of Ethers
Ethers (R-O-R’) are compounds formed by replacing hydrogen atoms of an alcohol (R-OH compound) or a phenol (C6H5OH) by an aryl/ acyl group (functional group after removing single hydrogen from an aromatic ring). In this section, reaction, preparation and behavior of ethers are discussed in the context of organic chemistry.
Epoxides
Epoxides are a special class of cyclic ethers which are an important functional group in organic chemistry and generate reactive centers due to their unusual high reactivity. Due to their high reactivity, epoxides are considered to be toxic and mutagenic.
Williamson Ether Synthesis
An organic reaction in which an organohalide and a deprotonated alcohol forms ether is known as Williamson ether synthesis. Alexander Williamson developed the Williamson ether synthesis in 1850. The formation of ether in this synthesis is an SN2 reaction.
for part b, besides drawing the reaciton coordiate diagram, can you give. a quite detailed explanation about how do we know which curve corrresponds to A or B. i.e. how do we know A or B energy is higher ; whether theres energy differnce between reactant and products. thanks
help with part b please
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