# How to I identify the diene and dienophile through retrosynthesis of a given compound?

I'm stuck while finding what to use to make this compound:

My first attempt was to use a triple bond as dienophile and a ring as my diene, as shown below -

But I'm not sure if this is right.

• Thats the way it was given to me by a friend but yeah there would be a -2 on the co3 It would be trivial if the bottom double bond was on the bond that connects the two rings but using the diels-alder mechanism I can't really see how to get that structure. Why guess so far is I need a triple bond dieophile and a ring as my diene – Loststudent22 Feb 26 '15 at 7:45
• It would be great if you could would your retrosynthesis (the one from your comment) into your question! It would be a waste if the question would get closed despite the fact that you have definitely thought on it and came to a reasonable approach! – Klaus-Dieter Warzecha Feb 26 '15 at 8:57
• The compound as drawn is impossible. You're alluding to carbonate [CO3(2-)] in the comment, but that cannot be attached to the structure. Draw it out completely to convince yourself. One mistake in a structure makes me skeptical about the accuracy of the rest. – jerepierre Feb 26 '15 at 15:03

The $\ce{CO3}$ substituents are questionable. Let's assume that this is $\ce{CO2Me}$ instead!