1. Synthesis of α, β-unsaturated ketones of the 2-phenylthiophene series

   • A. E. Lipkin
   • S. I. Borisov

   Letters to the Editor Pages: 691 - 691

2. General method for the synthesis of cyclic sulfides

   • V. I. Dronov
   • V. P. Krivonogov

   Letters to the Editor Pages: 691 - 692

3. Nitration of 3-methyl-3H-imidazo[4, 5-b]pyridine

   • R. M. Bystrova
   • Yu. M. Yutilov

   Letters to the Editor Pages: 692 - 692

4. Quaternization of 3-methyl-3H-imidazo[4,5-b]pyridine

   • Yu. M. Yutilov
   • R. M. Bystrova

   Letters to the Editor Pages: 692 - 693

5. Conversion of 1-aryl-5-bromodihydrouracils into 1-aryluracils

   • R. S. Baltrushis
   • I. I. Marioshyus

   Letters to the Editor Pages: 693 - 693

6. 9-purinyl-α-amino acids

   • M. Yu. Lidak
   • Ya. Ya. Shluke
   • Yu. P. Shvachkin

   Letters to the Editor Pages: 694 - 694