00:01
Okay, we need to carry out a reaction.
00:05
I'll illustrate it here.
00:09
Oh, what is going on? all right, and we want, i guess i'll draw this on, it doesn't really matter.
00:28
We basically want to open up this epoxide in the following manner.
00:50
Right.
00:52
And we're asked the various ways that we might accomplish this.
00:58
Right.
00:58
So first of all, let's kind of step through what we know.
01:02
Must have happened.
01:04
Right.
01:04
So i'm going to color one of these carbons in green and one of them in blue so that it makes easier for them to talk about.
01:12
Now, the green carbon is the more substituted carbon, and the blue carbon is less substituted, right? so i may refer to that as well.
01:20
Clearly, what has happened here is that a methoxide ion has attacked at this less substituted carbon, right? so we kind of have to ask why did it attack there and not here? and then we have to recall what we know about the reactions of epochsides, right? so one thing that you'll need to know is that in acidic conditions, attacks on epoxide will occur at the more protein or the more substitute carbon, whereas in basic conditions, attacks will occur at the less substituted carbon, right? so what that tells me is that we had a methoxide ion attacking that carbon in basic conditions.
02:14
So whatever we're doing, we're probably not doing it with h -plus or h2 -04, h -s -2 -04, yada, which really says that we're not talking about the second option.
02:25
We're not talking about the fourth or the fifth option.
02:28
Those are all in acidic conditions...