For the Diels-Alder reaction, the product's skeletal structure and configuration at the bridgehead carbons are given (and the given wedge bond and dash bond should not be changed). Complete the structure of the major product. Indicate the stereochemistry, by adding two wedge and two dash bonds, at only the fused-ring stereocenters. Complete the product and clearly show stereochemistry. H H
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- For the Diels–Alder reaction, the product's skeletal structure and configuration at the bridgehead carbons are given (and the given wedge bond and dash bond should not be changed). Complete the structure of the major product. Indicate the stereochemistry, by adding two wedge and two dash bonds, at only the fused‑ring stereocenters.For the Diels–Alder reaction, the product's skeletal structure and configuration at the bridgehead carbons are given (and the given wedge bond and dash bond should not be changed). Complete the structure of the major product. Indicate the stereochemistry, by adding two wedges and two dash bonds, at only the fused‑ring stereocenters.A very large number of Diels-Alder reactions are recorded in the chemical literature, many of which involve relatively complicated dienes, dienophiles, or both. Predict the constitution of the Diels-Alder adduct that is expected to form from the combination of diene and dienophile below. Draw the structure of the predicted product, including relevant stereochemistry when applicable. If applicable, use the Bicyclic Stamp tool and guide points to draw each structure. NH + NC CN X NC CN Click and drag to start drawing a structure.
- A very large number of Diels-Alder reactions are recorded in the chemical literature, many of which involve relatively complicated dienes, dienophiles, or both. Predict the constitution of the Diels-Alder adduct that is expected to form from the combination of diene and dienophile below. Draw the structure of the predicted product, including relevant stereochemistry when applicable. If applicable, use the Bicyclic Stamp tool and guide points to draw each structure. Click and drag to start drawing a structure.Although the Diels–Alder reaction generally occurs between an electronrich diene and an electron-deficient dienophile, it is also possible to have inverse-demand Diels–Alder reactions between suitable electrondeficient conjugated double bonds and electron-rich alkenes. These reactions are particularly useful because they allow for the incorporation of heteroatoms into the new six-membered ring. Predict the products of each inverse-demand Diels–Alder reaction below. Be sure your products reflect the correct stereochemistry. If more than one regioisomer is possible, draw both.Provide the product(s) for the following Diels-Alder reaction. Assume that the conditions are irreversible, and be sure to indicate the stereochemistry of the product where applicable. & H
- Many variations of ring-closing metathesis have now been reported. Tandem ring–opening–ring-closing metathesis can occur with cyclic alkenes that contain two additional carbon–carbon double bonds. In this reaction, the cycloalkene is cleaved, and two new rings are formed. [1] What compounds are formed in this tandem reaction with the following substrates? [2] Devise a synthesis of the substrate in part (b) that uses a Diels–Alder reaction with diethyl maleate as the dienophile.Many variations of ring-closing metathesis have now been reported. Tandem ring-opening-ring-closing metathesis can occur with cyclic alkenes that contain two additional carbon-carbon double bonds. In this reaction, the cycloalkene is cleaved, and two new rings are formed. [1] What compounds are formed in this tandem reaction with the following substrates? [2] Devise a synthesis of the substrate in part (b) that uses a Diels–Alder reaction with diethyl maleate as the dienophile.Indane can undergo free-radical chlorination at any of the alkyl positions onthe aliphatic ring. Once the products have been separated, what instrumental technique would be most helpful for determining the structures of all the dichlorinated products?
- This is a Diels-Alder reaction between ethylene and cis-1,3-butadiene. For each cycloaddition product, draw in all hydrogen atoms, and write the molecular formula below.(a) Complete the following sequence of reactions (i.e., give the structure for compounds A and B), giving structural details of all key intermediates. heat & A COOCH3 H₁₂ Ni (b) Provide the bond line structures for the pair of compounds used for the Diels-Alder synthesis of the compound shown below. O B COOCH3 (c) Draw the two major products obtained when (3E,5Z)-2,2,3,6,7-pentamethylocta-3,5-diene reacts with HBr at low and high temperatures. Label the products as the kinetic or thermodynamic product AND, if applicable, use dashes and wedges to show the correct stereochemistry in the obtained products.in a diels-alder reaction involving 2,3-dimethyl-1,3-butadiene and maleic anhydride, which is the diene and which is the dienophile?