Results Disulfur monoxide generated by pyirolysis of thiirane oxide (1) reacted with 2, 3-di~ h~ enylbutadiene (1)(a) For a review of the early literature, see 9. D. Turk and RL Cobb in “1, 4-Cycloaddition Reactions,” J. Hamer, Ed., Acibdemio Press, New York, NY, 1967, pp 13- 45.(b) WL Mock, J. A nw. Chem. Soc., 88, 2857 (1966).(2)(a) RM Dodson and RF Sauers, Chem. Conimun., 1189 (1967);(b) RM Dodson and JP Nelson, ibid., 1159 (1969).(3)(a) ...