Classify the following sigmatropic rearrangement and determine whether it takes place readily under thermal or photochemical reaction conditions.
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Classify the following sigmatropic rearrangement and determine whether it takes place readily under thermal or photochemical reaction conditions.
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- The transformation takes place via two sequential pericyclic reactions. Identify the two reactions and give a critical explanation whether the reactions are allowable or not. Explain the stereochemistry.Provide the major product including stereochemistry for the following reaction.Complete the following reactions, clearly indicating regio-and stereochemistry where applicable. In cases, where ortho-and para-products are formed, draw both.
- On photolysis, A undergoes primarily Norrish II chemistry, but B undergoes primarily Norrish I chemistry. Rationalize the difference and draw the major products expected from each reaction. (note the stereochemistry in the ring structure).What type of sigmatropic rearrangement is illustrated in each reaction?Predict the major organic product for the following reaction sequence, and then determine the stereochemical nature of the final product.
- Arrange in increasing reactivity in an SN1 reactionWhen a single compound contains both a nucleophile and a leaving group, an intramolecular reaction occurs. With this in mind, what is the structure and stereochemistry of the following reaction?Mechanism time! Upon treating the indicated starting material with HCl the resultant polycyclic product was formed. Please provide a reasonable arrow-pushing mechanism to account for the formation of the indicated product, including the drawing of all resonance structures after the requisite C-C bond has bond.
- Rank the following compounds in order of their expected reactivity towardSN2 reactions and explain your order. CH3Br, CH3OToS, CH3CCl, CH3CHCl1 Complete the following reaction scheme. Give all product(s) and indicate major or minor and any relevant stereochemistry.Identify the pericyclic reactions in the followingreaction schemes. Give the complete reaction name and indicate the course of the reaction with the aid of the arrow notation.