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.