00:01
Let me draw the reactant we have been given.
00:07
So there are two triple bonds and we have ch2 and we have methoxy group and we have double bond on this terminal carbon.
00:36
Okay.
00:37
And then we have given heat.
00:43
So now first of all, whenever.
00:45
We have been given here this compound with two double bonds this is called dye e okay and now okay let me complete this we have nitrogen atom here okay so can i draw this again so this one can also be drawn like so we have a triple bond okay to this carbon atom containing one hydrogen atom okay of course triple bonded carbon atom will have one hydrogen atom right let me show you again and we have here cn group a test right this is what c triple bond n c c triple bond n so this is what cn group right so we have a carbon atom here right this one and to this carbon acn group is attached okay so to this carbon a cn group is attached so this can be drawn like this okay so now further this die in so we can draw it like let me show that in vertical position okay so we have let me draw it again we have ch2 group okay so can i omit this d -ch2 group okay and actually we have a methoxy group right so this is the methoxy group now keep in mind this methoxy group this is electron rich right this will act as a electron releasing group okay this metholy this methoxy group will elect this has the electron density rich group and it will increase the electron density for this diene okay now dye in of course we have double bond so of course it will act as an electron rich center and now it has a electron releasing group attest to okay so that's why it has a rich electron density but in this case we have a triple bond and a carbon containing nitrogen atom so this is what this will make it electron deficient so what happens that dien being electron rich that will attack on this electron deficient dinofile.
03:59
So this is what dynophile.
04:03
Okay.
04:05
And this is what diene.
04:07
And this reaction is taking place in the presence of heat.
04:10
Okay.
04:11
So this is because this temperature requires a lot of temperature to undergo because we form the bonds.
04:19
New bonds are formed here.
04:21
And whenever new bonds are formed, that requires.
04:23
A very lot of temperature okay and hence we have to provide that temperature by heat and this reaction is called die elder's reaction okay this reaction is called dial elder reaction okay so now okay so first of all actually we need to twist this bond okay and then that's why there will be stereochemistry around this compound formed.
05:10
So i will show you that but first of all, so this double bond will shift from here to here.
05:18
So that this double bond being electron rich, this will approach the electron rich carbon.
05:25
So now what will happen that this carbon will approach here.
05:32
So this is how new bonds are formed...