Regioselective synthesis of pyridoquinolones and pyridocoumarins via molecular iodine-mediated 6-endo-dig electrophilic cylization

Synthesis and crystal structures of (E)-N'-(4-chloro-3-nitro-benzyl-idene)acetohydrazide and (E)-2-(4-chloro-benzyl-idene)-1-(quinolin-8-yl)hydrazine

The syntheses of two benzyl-idenehydrazine derivatives, namely, (E)-N'-(4-chloro-3-nitro-benzyl-idene)acetohydrazide, C9H8ClN3O3, and (E)-2-(4-chloro-benzyl-idene)-1-(quinolin-8-yl)hydrazine, C16H12ClN3, are reported. The mol-ecules have been characterized using IR, 1H NMR, 13C NMR and mass spectro-scopic and elemental analysis techniques, and their structures have been determined by single-crystal X-ray diffraction.

I2-mediated regioselective C-3 azidation of indoles

An unprecedented synthesis of novel 3-azido indoles has been developed using I₂ and NaN₃ in high yields and excellent regioselectivity.