Phenylaziridine as a 1,3-dipole. Application to the synthesis of functionalized pyrrolidines

Abstract ce:simple-parahenylaziridine 1 in the presence of an appropriate Lewis acid reacts as a 1,3-dipole. The cyclocondensation of 1 with DHP in the presence of BF 3 ·Et 2 O produced the azaoxa[3.2.0] cycloadducts 4a–4b . The reactivity of the corresponding N -tosyliminium ions was explored.