Cycloaddition Reactions
Using the drawing pallet on the right, draw the structure
of the major organic product for the reaction shown below (do not show stereochemistry on monosubstituted cyclohexenes):
In a [4+2] cycloaddition reaction, new bonds will form
between the terminal carbons of the diene and the
alkene carbons of the dienophile, as shown below, to
give the substituted cyclohexene product.
Using the drawing pallet on the right, draw the structure
of the major organic product for the reaction shown below (do not show stereochemistry on monosubstituted cyclohexenes):
In a [4+2] cycloaddition reaction, new bonds will form
between the terminal carbons of the diene and the
alkene carbons of the dienophile, as shown below, to
give the substituted cyclohexene product.
Using the drawing pallet on the right, draw the structure
of the major organic product for the reaction shown below (do not show stereochemistry on monosubstituted cyclohexenes):
In a [4+2] cycloaddition reaction, new bonds will form
between the terminal carbons of the diene and the
alkene carbons of the dienophile, as shown below, to
give the substituted cyclohexene product.
Using the drawing pallet on the right, draw the structure
of the major organic product for the reaction shown below (do not show stereochemistry on monosubstituted cyclohexenes):
In a [4+2] cycloaddition reaction, new bonds will form
between the terminal carbons of the diene and the
alkene carbons of the dienophile, as shown below, to
give the substituted cyclohexene product.
Using the drawing pallet on the right, draw the structure
of the major organic product for the reaction shown below (use a hydrogen on a "wedge bond" to show endo - exo stereochemistry):
In a [4+2] cycloaddition reaction, new bonds will form
between the terminal carbons of the diene and the
alkene carbons of the dienophile, as shown below, to
give the substituted cyclohexene product. Since the diene
is cyclic, the product will be bicyclic
Using the drawing pallet on the right, draw the structure
of the major organic product for the reaction shown below (show stereochemistry):
In a [4+2] cycloaddition reaction, new bonds will form
between the terminal carbons of the diene and the
alkene carbons of the dienophile, as shown below, to
give the substituted cyclohexene product.
Using the drawing pallet on the right, draw the structure
of the major organic product for the reaction shown below (use a hydrogen on a "wedge bond" to show endo - exo stereochemistry):
In a [4+2] cycloaddition reaction, new bonds will form
between the terminal carbons of the diene and the
alkene carbons of the dienophile, as shown below, to
give the substituted cyclohexene product. Since the diene
is cyclic, the product will be bicyclic
Using the drawing pallet on the right, draw the structure
of the major organic product for the reaction shown below (show stereochemistry):
The cis-trans diene will react with the dienophile
to give a cyclohexene in an approximate "boat"
conformation. This will rapidly convert to the more stable
"chair" conformation, placing both methyl groups
1,4-equatorial, or trans- relative to each other (
cis-trans yields trans-). You should note
that since this is a cyclohexene ring, it is an
approximation to show the product in "chair" and "boat"
conformations.
Using the drawing pallet on the right, draw the structure
of the major organic product for the reaction shown below (show stereochemistry):
The trans-trans diene will react with the dienophile
to give a cyclohexene in an approximate "boat"
conformation. This will rapidly convert to the more stable
"chair" conformation, placing the methyl groups 1,4-
equatorial-axial, or cis- relative to each other (
trans-trans yields cis-). You should note
that since this is a cyclohexene ring, it is an
approximation to show the product in "chair" and "boat"
conformations.
Using the drawing pallet on the right, draw the structure
of the major organic product for the reaction shown below (show stereochemistry):
The trans-trans diene will react with the
trans-dienophile to give a cyclohexene in an
approximate "boat" conformation. This will rapidly convert
to the more stable "chair" conformation, placing (for the
diene) the methyl groups of the diene 1,4-equatorial-axial,
or cis- relative to each other ( trans-trans
yields cis-), and the methyl groups of the
dienophile 1,2-diequatorial or trans- relative to
each other (trans-dienophile yields
trans-product). You should note that since this is a
cyclohexene ring, it is an approximation to show the
product in "chair" and "boat" conformations.
That is correct!
Sorry, that is not correct. You should modify your
structures and try again. If cis-trans-
stereochemistry is required, please make sure you have
drawn the appropriate isomer using the "wedge bonds".
Stereochemistry is shown using the
"wedge" bond.
Click on the solid wedge to reverse orientation.
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