only the circled ones estions 1.) Why was 3-sulfolene used instead of using 1,3-
ID: 1082280 • Letter: O
Question
only the circled ones
estions 1.) Why was 3-sulfolene used instead of using 1,3-butadiene, directly? Why was a calcium chloride drying tube used? 3. Draw the mechanim of the Diels-Alder reaction of 1,3-butadiene with maleic anhydride. 4. Does the product have one or more chiral carbons? 5. Is the product optically active? Why or why not? 6. What would be the product if dimethyl maleate (cis-MeO2CCH-CHCO2Me) was heate the presence of 3-sulfolene? Would the product be optically active? 7·/What would be the product if dimethyl fumarate (trans-MeO2CCH-CHCO2Me) was 1 in the presence of 3-sulfolene? Would the product be optically active?Explanation / Answer
Q:1 3-sulfolene is solid at room temperature while buta1,3 diene is gas there 3- sulfolene is eaisy to handle beside this it is non toxic and non flammable ,that why 3-sulfolene is used .and 3- sulfolene decompos to form but a 1,3 diene and SO2 leave.
Q3 calcium chloride keep reaction mixture water free therefore avoid any other product or conversion of anhydride in to acid
Q7 dimethy fumarate react with 3- sulfolene to form trans - 1,2- dimethoxycarbonylcyclohexe is formed and it will be optically active.
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