00:01
Let me draw the structure of cholesterol first we have given here.
00:05
So we have this cyclohexane ring to this ohh group is attached.
00:15
And we have double bond.
00:25
Now it is to be noted that this double bond is not present in the given figure.
00:31
So that's why the given figure is incorrect and in the core.
00:36
Cholesterol structure as we have given that the given structure is of cholesterol.
00:43
So you can recheck yourself the structure of cholesterol and you will find out that there is double bond in this ring here.
00:53
Okay.
00:54
So this double bond is not given in the given picture we have.
00:58
Okay.
00:59
So we need to correct the diagram first of all.
01:02
So the correction is here of this double bond.
01:05
You can recheck yourself and then yes we have methyl group okay let me draw it again then we have another ring then another ring methyl group is there then we have a carbon chain given like this okay so let me read the reagents we have given.
02:03
So it is to be reacted with bromine molecule.
02:06
It is to be reacted with hbr.
02:10
It is to be reacted with bh3, that is borane in presence of thf, tetrahidrofuran, and h2o2, naoh.
02:28
Okay.
02:30
Hydrogen peroxide and this is sodium hydroxide.
02:32
The strong base.
02:35
Let me rewrite this, okay, there will be lack of space otherwise.
02:43
So this was bh3, thh2o2, n -a -o -h.
02:59
Now consider this reaction first of all.
03:02
So this reaction is called hydroboration oxidation, okay? so now we have the cyclohexane ring to which oh group is attached and then let me draw it again we have this again the cyclohexane ring and ch3 group is there and let me draw it again so can i skip this to write this ch3 i hope you understand right there is a methyl group and methyl group can also be represented by line single line only right then let me draw the complete structure first of all.
04:17
Okay, okay.
04:23
Okay, so this is the structure.
04:24
Now what will happen here? so, hydroboration oxidation reaction follows the anti -marcovnikov addition.
04:32
So in this case, the oh group add on the carbon atom with the more number of hydrogen atom.
04:41
And the positive part that is hydrogen that adds on the carbon with more number of hydrogen less number of hydrogen sorry okay so the anti -markovnikov addition is to be followed here okay anti -markovnikov addition so the final product will be oh group will be here okay carbon with more number of, sorry, carbon with more number of hydrogen atom and this is the carbon with less number of hydrogen atom...