Can u pls explain me this mechanism ?

sir what is ene reaction

wait..

ok sir

The ene reaction is a chemical reaction between an alkene with an allylic hydrogen and a compound containing a multiple bond, in order to form a new σ-bond with migration of the ene double bond and 1,5 hydrogen shift. The product is a substituted alkene with the double bond shifted to the allylic position. 

ene reaction takes place between compounds having double bonds such as alkene, carbonyl, O2 etc with allylic H

their is some network issues sir I will reply and ask about it after some time sorry for this sir

sir how here 1.5 Hydrogen shift occurs can u pls explain me this by image

check it

yes sir

and sir what is 2.3 sigmatropic rearrangment

??

it is 2,3 sigmatropic

I can't understand this sir

how it happens and why it is 2.3 sigmatropic

wait ypu need it in details. actually it is the part of pericyclic reaction. do you have notes??

first need to study pericyclic reaction to understand concept

no sir

okay then I'll send you notes

ok sir

https://youtu.be/Upi8UJgwnPo

check above vide to understand concept of sigmatropic shift

ok sir

sir in this video their in no 2.3sigmatropic rearrangment

sorry i didn't check wait..

ok sir

check next part

https://youtu.be/XdQiGcMzJ8o

ok sir

sir can u pls send me mechanism of this reaction

yes, I'll send you later.

ok sir

check it

how to sift H here sir here 2 allylic and 1 benzylic H present na sir

sir this is also a Allylic c na why u can take H from here ?

here we take most acidic H.

because H transfer in ene reaction

but sir how to know which H will transfer

sir how to know which H will be trasfer

wait simun I'm checking this concept again. I'll inform you once get it. actually I'm busy so can't be focused it.😊

ok sir

check it simun and compair the both case

I can't get it sir

in Ist case negative charge is destabilize by +I effect of C2H5 while in 2nd case it is destabilize by CH3. so in case 2nd negative charge is more stable than 1st

so H removed from more substituted allylic position

ok sir

ok sir