The reaction product is a very unstable ortho-quinodimethane but this molecule can be trapped in an endo addition with a strong dienophile such as maleic anhydride to the Diels-Alder adduct .
The reaction product is a very unstable ortho-quinodimethane . This molecule can be trapped in an endo addition with a strong dienophile such as maleic anhydride to the Diels-Alder adduct .