00:01
Hello students, in this question we have to answer two questions about diels -alder reaction.
00:06
In the first reaction we have two reactions that we have to carry out.
00:10
So, in the first part we have to carry out the diels -alder reaction between buta -1 ,3 -diene and dimethyl malate.
00:18
So, this is dimethyl malate.
00:24
This is a type of ester.
00:27
Now, the cyclization between these two reagents happen like this, as a result of which there will be a six -membered ring that will be formed.
00:40
Now, since these two groups were cis to each other, they will be syn in the final product as well.
00:51
That means, they will either be both above the plane or they will be both below the plane.
00:58
So, here i am showing both these above the plane.
01:02
This will be the structure formed by diels -alder reaction of 1 ,3 -butadiene and dimethyl malate.
01:11
In the second part of this first question, we have to carry out the diels -alder reaction between these two molecules.
01:22
So, this is basically the same type of dienophile, but the only difference is the two ester groups are trans to each other.
01:32
Now, the cyclization will take place exactly the same way it happened before, but the only difference will be, since these two groups are trans to each other, they will be present anti in the final product.
01:53
That means, these are the two carbons which will contain co2me groups.
02:00
They will be anti to each other.
02:02
That means, they will be in opposite planes...