00:03
This is the answer to chapter 16, problem number 29, from the smith organic chemistry textbook.
00:11
And in this problem, we are asked, what dine and dineophile are needed to prepare each compound by a deal's alter reaction? and so i think probably the way to start this problem is to redraw these two ball and stick model molecules that we've been given as skeletal structures.
00:33
In my opinion, it's much easier to look at a skeletal structure.
00:37
And so that's what i've done.
00:40
And then in order to solve these, we can think about moving electrons to sort of undo the diels -alder reaction and to get back our dine and dionophile.
00:55
Also, we should note since our molecules here, in both cases, are fused rings.
01:00
We're going to start with one ring and then another molecule.
01:06
So each of the right sides of these reactions here should have one ring in them.
01:11
Okay.
01:12
And so for a, we can think about moving our electrons like this.
01:24
And when we do that, we will get these two molecules.
01:31
So here is our five -membered ring.
01:36
With two double bonds in it.
01:38
So there's our dine...