Interpretation:
The two pericyclic reactions involved in the two step process, a cycloaddition and a reverse cycloaddition are to be identified. Further how the reactions occur also is to be stated.
Concept introduction:
In cycloaddition reaction two unsaturated molecules add to one another to yield a cyclic product
If even number of electron pair is involved then thermal reaction occur through antarafacial pathway and photochemical reactions occur through suprafacial pathway.
If odd number of electron pair is involved then thermal reaction occur through suprafacial pathway and photochemical reactions occur through antarafacial pathway.
To identify:
The two pericyclic reactions involved in the two step process, a cycloaddition and a reverse cycloaddition and to state how they occur.
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Chapter 30 Solutions
Organic Chemistry
- Draw the structure of compounds (E-H) from the following cycloaddition reactions.arrow_forwardPredict the major product, which will be formed under the depicted reaction conditions . Be sure to indicate stereochemistry clearly when relevant.arrow_forwardIdentify the pericyclic reactions in the following reaction schemes. Give the complete reaction name and indicate the course of the reaction with the aid of the arrow notation.arrow_forward
- Classify the following sigmatropic rearrangement and determine whether it takes place readily under thermal or photochemical reaction conditions.arrow_forwardDraw the major organic product(s) for the following reaction, and include all relevant stereochemistry. If more than one stereoisomer is formed, show both stereoisomers.arrow_forwardDraw the structure of compounds from the following cycloaddition reactionsarrow_forward
- Show the detailed mechanism of this in 3D structure, and predict the major regioisomer and the major stereoisomer with a stepwise explanation. show the final major product in Newman projection.arrow_forwardaddition of hbr to a double bond with an ether (-or) substituent occurs regiospecifically to give a product in which the Br OR are bonded to the same carbon. Draw the two possible carbocation intermediates in this electrophilic addition reaction,and explain using resonance why the observed product is formed.arrow_forwardShow the structures for the major/significant organic product(s) expected for the following eleven reactions or sequences of reactions. If there is a major and minor productcircle the major product. Show all relevant stereochemistry.arrow_forward