00:03
This is the answer to chapter 27, problem number 34, from the smith organic chemistry textbook.
00:10
And so we're given this starting material m, and we are asked to draw the product when m undergoes a disrotatory cyclization.
00:21
And we're asked to decide what sort of conditions are going to promote this disrotatory cyclization.
00:30
So we can start, well actually, so before we even draw the product, we can draw the movement of electrons.
00:45
And so we'll be like this for our electrocyclic cyclization.
00:54
There we go.
00:56
So we will have a new sigma bond there, pi bond there, and the other six -membered ring.
01:10
And because the problem is telling us that this is disrotatory, we can draw in our stereochemistry here.
01:19
These two hydrogens will have a cis relationship.
01:23
And then we're asked what sort of conditions will promote this...