Reactivity in Cycloadditions of New 4-Trifluoromethyl-1,3-oxazin-6-ones: Access to Functionalized 2-Trifluoromethyl Pyridines

Article abstract of DOI:10.1002/prac.19933350106

Recently discovered 4-trifluoromethyl-1,3-oxazin-6-ones react with electron-poor dienophiles as 2-aza-1,3-dienes in Diels-Alder cycloadditions to give new 2-trifluoromethyl pyridines (3a-d, 4a-c).Regioselectivity is excellent in the case of unsymmetrical