Ar. Katritzky et al., AROMATIC ANNULATIONS VIA BENZOTRIAZOL-1-YL-PHENYLTHIOMETHANE AS A 1,1-DIPOLE SYNTHON EQUIVALENT, Heterocycles, 36(6), 1993, pp. 1367-1373
The tide compound readily deprotonates and reacts with appropriate ele
ctrophiles to form derivatives which upon subsequent treatment with Le
wis acids undergo ring closure to afford fused aromatics.