Test: Sigmatropic - Chemistry MCQ

The major product P of the given reaction is:

In the reaction the major products X and Y are:

In the reaction, the major product (X) is:

The pericyclic reaction given below is an example of:

Claisen rearrangement is an example of:

The product of the following reaction is: 

In sigmatropic thermal expansion of 1, 1-dicyclopropyl ethene, the final product:

Give the structure of the product in the following reaction:

This sigmatropic reaction is example of:

The following transformation proceeds by the sequence indicated. Give the structure of product: 

Allyl aryl ether on heating at 200°C give the major product:

Which of adducts (a)-(d) is the main product of the following Diels-Alder reaction?

Consider the following statements:

(I) Clasisen rearrangement is a [3, 3] sigmatropic rearrangement.
(II) Cope rearrangement proceeds via is chair like transition state.
(III) In the photochemical [2 + 2] cycloaddition of ethylene overlapping of HOMO of one molecule with LUMO of the other molecular takes place.

Select the correct statements.

The product is:

The major product of the following reaction is:

The major product of the following reaction is:

In which of the following reaction, which sigmatropic reaction will take place:

The reaction given below is an example of:

Among the following dienes, the one that undergoes a degenerate Cope rearrangement is:

Pericyclic reaction involved in one of the steps of the following reaction sequence is:

The product formed and the process involved in the following reaction is:

The two step conversion of 7-dehydrocholesterol to vitamin D₃ proceeds through:

The major product formed in the following reaction is:

With respect to the following biogenetic conversion of chorismic acid (A) to 4-ydroxyphenylpyruvic acid (C), the correct statement is:

Formation of the ketone (II) fro m the diazoketone (I) involves:

The reaction is given below is an example of:

The major product is: