1070313-41-5Relevant academic research and scientific papers
Cycloaddition across the benzofuran ring as an approach to the morphine alkaloids
France, Stefan,Boonsombat, Jutatip,Leverett, Carolyn A.,Padwa, Albert
, p. 8120 - 8123 (2008/12/22)
(Chemical Equation Presented) The intramolecular Diels-Alder reaction of several amidofurans tethered onto a benzofuran ring was examined as a strategy for the synthesis of morphine. Bromo substitution on the furan ring did not provide sufficient activation to allow the cycloaddition to take place across the aromatic benzofuran. However, the presence of a large o-methyl-benzyl group on the amido nitrogen atom causes the reactive s-trans conformation of the amidofuran to be highly populated, thereby facilitating its Diels-Alder cycloaddition across a tethered benzofuran.
