REACTION OF 4-METHYL- 1 2,4-TRIAZOLINE- 3,5-DIONE WITH DI AND TRI-SUBSTITUTED STYRENES S.E. Mallakpour* and G.B. Butler**

2,4,6-Triisopropylstryrene was synthesized in a single step via the Witting Reaction from the corresponding aldehyde. The reaction of three styrene's derivatives, 2,6-dimethylstyrene, 2,4,6-trimethylstyrene, and 2,4,6- triisopropylstyrene with 4-methyl-l,2,4-triazoline-3,5-dion(M eTD) was investigated. These reactions are instantaneous at room temperature and lead to the formation of 2: 1 adducts in high yield via double Diels-Alder reactions. In each case the initially formed 1:l Diels-Alder adduct is extremely reactive, and was not isolated. It readily undergoes the second Diels- Alder reaction with MeTD. These 2:l adducts wete fully characterized by IR, CNMR(o ff- resonace, INEPT, multiplicity determination sequence techniques), mass spectra, 'HNMR and elemental analysis.