Concept explainers
(a)
Interpretation:
The following reactions by giving the major organic product(s), including stereochemistry is to be completed.
Concept introduction:
Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved. In [4+2] cycloaddition one component is having four electrons and other component is having two electrons.
(b)
Interpretation:
The following reactions by giving the major organic product(s), including stereochemistry is to be completed.
Concept introduction:
Sigmatropic reaction can be described as the migration of allylic sigma bond at one end of the π-electron system to the other end of the π-electron system as an uncatalyzed intramolecular reaction. In some cases, Lewis acid catalysts can also be applied. Though, the position of π-bond is changed in Sigmatropic reaction, the total number of π-bonds remain unchanged. The sigma bond can be cleaved at the middle or at the end of the π-system. The formation of sigma bond at 3, 3-position of a 1, 5-diene is called as cope rearrangement.
(c)
Interpretation:
The following reactions by giving the major organic product(s), including stereochemistry is to be completed.
Concept introduction:
Cycloaddition reaction can be referred as a reaction of two different π-electron systems to form a ring product. Notably, in this reaction two new sigma bonds are formed in product with the disappearance of two fewer π-bonds. In other words, cyclo addition reaction can be best described as the reaction of number of electrons involved.
(d)
Interpretation:
The following reactions by giving the major organic product(s), including stereochemistry is to be completed.
Concept introduction:
Generally, [3, 3] sigmatropic reactions of 1, 5-diences are called as cope reactions. When the diene is having the oxygen at C3 or C4 position the sigmatropic reaction is called as oxy cope reaction. Notably, when the alkoxide fragment is involved it is referred as anionic oxy cope reaction. Moreover, the enhanced increase in
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Organic Chemistry
- Provide the principle organic product(s) for the following reactions. If more than one product is expected, indicate the major product. Indicate stereochemistry where appropriate.arrow_forwardgive the major products and include stereochemistry when appropriatearrow_forwardGive the major organic product of the following reactions.arrow_forward
- Provide the major products and show stereochemistry if needed.arrow_forwardIndicate the reagents and conditions to carry out the following transformations.arrow_forwardPredict the major organic product of each of the following reactions or provide the reagent needed to complete each transformation.arrow_forward
- Give the major organic product generated by each of the following reactionsarrow_forwardGive the major organic product(s) or reagents needed for the following reactions or sequences of reactions. Show all relevant stereochemistry.arrow_forwardProvide the major organic products for the following reactions.arrow_forward
- Provide the missing products/intermediates in each of the following reactions. Show relative stereochemistry where appropriate.arrow_forwardProvide the major products (write “no reaction” if you think so) for the following reactions with correct stereochemistry.arrow_forwardProvide either the missing product or missing reagent for the following reactions. Provide stereochemistry where relevant and if no reaction occurs, say soarrow_forward
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