00:01
We're asked to use green yard reagents to create the following compounds.
00:04
So we're starting with methanol.
00:07
So the al at the end implies we have an aldehyde.
00:09
We know methane is one, so one carbon.
00:12
We're asked to use bromobutane.
00:15
So in order to get a green yard reagent, we're going to react this with magnesium over either thf or an ether.
00:30
And we're going to get butyl magnesium bromide.
00:38
So the magnesium is much like.
00:41
Extra negative than the carbon so it's going to have a partial positive charge so therefore the carbon is an equal file this is a strong base and now we can react it with the aldohide so it attacks the carbonyl carbon and converts the ketone and alcohol so you have this and then you just add whatever was attached to magnesium bramide which was the four carbon chain one two three four so if we count it we have one, two, three, four, five.
01:23
So we have pentanyl.
01:36
That's the first one.
01:38
The second one is to create two hexanol.
01:42
So let's start with, start with this.
01:50
And in order to use a green yard reagent, we need a ketone.
02:00
And you get a ketone, we need an alcohol.
02:02
So let's use the hydration reaction of alkenes to get an alcohol.
02:12
So now we've ethanol.
02:14
Let's react this with a mod.
02:15
Oxidizing agent, because you have a primary alcohol.
02:19
You can use pcc or desmartin periodine.
02:25
So again, if we react this with a strong oxidizing agent, like lithium -olubinum borohydride or sodium dichromate, we're going to get a carbocic acid, and we can't use carboxylic acids with green yard reagents.
02:42
So we have an aldehod.
02:46
And now i already showed how to create the green yard reagent, so let's just react this with.
02:50
We need four more carbons for hexanol.
02:55
Let's use magnesium and chloride this time.
03:02
It's the same process.
03:03
The carbon attacks, the carbonil carbon, carbon, oil carbon, ketone and alcohol.
03:10
So we have the structure.
03:14
One, two, three, four.
03:16
So we have, or this is a stage three down here.
03:21
So one, two, three, four, five, six.
03:29
So two hexanol.
03:35
Next one is to create two methyl two hexanol.
03:39
And the only thing you need to do here is replace the hydrogen with a methyl.
03:46
So instead of the starting material being two carbon change, just use propane...