9-Fluorenethione Sp-toluenesulfonimide reacted as a 1, 3-dipole with imines, oximes, and thiones to form (3+ 2) cycloadducts, while with symmetrical azines and aldehydes, unsymmetrical azines, N-(p-tolylsulfonyl) imines and fluorenone were obtained as a result of the decomposition of the cycloadducts.