[mandy9008]

i need to draw the major product of the attached rxn. my answer is also on the attached file. i don't know what i did wrong
thanks

[plankk]

First of all ,draw your diene in s-cis conformation, cause only this form can do Diels-Alder. Next look here for the mechanism and try to do the same with your diene and dienophile.

Good luck

[Scatter]

Also, count your carbons.  You should end up with a six membered ring...

[orgopete]

There was another question on a Diels-Alder reaction. Although your question did not limit the diene stereochemistry, you need to use the cisoid stereochemistry. You may also follow the preferences that result in an endo product for a bicyclic system to give the major product for your reaction. (An example is given in this forum here.) You will need to carefully make the bond connections and bond reductions that result in the product.