Predict the products of the following reactions. (i)

Question

Accepted Answer

Hey everyone. Let's do this problem. It says proposed the structures of the products in the reaction given below. Well, I noticed that I have a dying here to conjugated double bonds. And I have an alkaline which can act as a dying a file. Right? This electron poor al kind with these electron withdrawing groups. So if we have a dying and a dying a file, this can be a deal's alder reaction, Which is a 4-plus 2 cyclo addition reaction. Right, I should specify are dying, has four pi electrons. And our Diana file has at least two pi electrons, which is what we need. And this forms a six member ring product. Okay, so knowing what it deals all the reaction will help us propose the products for our given reaction. So let's quickly review what the deals all the reaction looks like. We have a dying and a dying file. Let's say something like this. And in our deals all the reaction, we always have the iconic three arrow mechanism going from our Diana file first to our dying, having one narrow push that double bond over in our dying. And then our last arrow going from are dying back to our diana file. And this happens all in heat to give us our six member ring now connecting all of those carbons. And we've broken two pi bonds and formed sigma bonds and now we've formed a new pi bonds in between and we keep our substitution group from our diana file. And this all happens simultaneously. The electron movement in this mechanism. And one last thing about this reaction is that it's stereo specific. So the reaction is a syn addition and the configuration of the diana file is retained in the product. So sis diana file sys product trans diana file trans product. So let's apply this mechanism two or given reaction. So I'm going to highlight the dying in blue and highlight the carbons of the diana file in yellow so that we can keep track of the carbons in our product. So we have our Diana file are alkaline attacking are dying This double bond moving over in our dying, going back and attacking the Diana file 123. So now notice that we're going to be forming a six member ring but are dying is already in a ring. So this is going to be a bicyclist compound will have that oxygen bridge atom there. So let's draw our six member ring and are bridged oxygen atom. Can you see that? Okay, let me try to draw that a little bit better. There we go. So we have are dying and our diana file, does that make sense? And we've created a new double bond in our dying and are dying. A file was an AL kind. So now it's going to be an al keen. So it's losing one double bond and then we are retaining our substitution groups are ch O groups. So this is the expected product for this reaction, which makes a the correct answer choice for this problem. That's it for this one. I hope this video is helpful, and thanks for watching.

Predict the products of the following reactions. (i)

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