REACTION OF 4-PHENYL-1,2,4-TRIAZOLINE-3,5-DIONE WITH SUBSTITUTED INDENES

Article abstract of DOI:10.1016/0040-4039(88)85204-3

4-Phenyl-1,2,4-triazoline-3,5-dione (PTAD) reacts with 2,3-dimethyl and 2-methylindene at low temperature mainly to give 1,2-addition products.These products interconvert, then isomerise completely to the ene adducts in solution at RT.In methanol, solvent adducts are formed that also convert to the ene product.