## 3 Experimental Section
### Synthesis and Characterization
#### 3.2.2 Synthesis of Unsymmetrical \(N\),\(N^{\prime}\)-Diacylhydrazines (**3a-e**)  
Benzhydrazide (**2**, 3.0 g, 0.02 mol) was suspended in dry diethyl ether (30 mL), then acid chloride (0.02 mol) dissolved in additional portion of dry diethyl ether (10 mL) was carefully added at room temperature. The reaction mixture was agitated at room temperature for about 30 min, then the solution of sodium carbonate (2.12 g, 0.02 mol) in water (15 mL) was added. The content of the flask was further agitated for 30 min, after which the white precipitate formed was filtered, washed with diethyl ether (20 mL), and air dried.  
\(N^{\prime}\)-Benzoyl-4-(bromomethyl)benzoylhydrazizide (**3a**)  
The product was obtained as white powder (5.73 g, 78%); m.p. 220-222 \({}^{\circ}\)C. 1H-NMR (400 MHz, DMSO): 8 4.77 (s, 2H), 7.53 (t, \(J\) = 8 Hz, 3H), 7.59 (d, \(J\) = 8 Hz, 2H), 7.92 (m, 4H), 10.52 (s, 1H), 10.53 (s, 1H); 13C-NMR (100 MHz, DMSO): 8 33.4, 127.4, 127.8, 128.5, 129.3, 131.8, 132.3, 132.5, 141.8, 165.4, 165.8. HRMS (ESI): \(m/z\) calcd for C\({}_{15}\)H\({}_{8}\)BrN\({}_{2}\)O\({}_{2}\) + H\({}^{+}\): 333.0239, 335.0220; found 333.0234, 335.0219.  
\(N^{\prime}\)-(2-Bromoacetyl)benzoylhydrazizide (**3b**)  
The product was obtained as white powder (2.60 g, 46%); m.p. 152-154 \({}^{\circ}\)C. 1H-NMR (400 MHz, DMSO): 8 4.00 (s, 2H), 7.50 (t, \(J\) = 8 Hz, 2H), 7.59 (t, \(J\) = 8 Hz, 2H), 7.92 (m, \(J\) = 8 Hz, 2H), 10.42 (s, 1H), 10.53 (s, 1H); 13C-NMR (100 MHz, DMSO): 8 27.1, 127.4, 128.5, 131.9, 132.2, 165.3, 165.4. HRMS (ESI): \(m/z\) calcd for C\({}_{9}\)H\({}_{9}\)BrN\({}_{2}\)O\({}_{2}\) + H\({}^{+}\): 256.9926, 258.9906; found 256.9920, 258.9901.  
\(N^{\prime}\)-(3-Bromopropanoyll)benzoylhydrazizide (**3c**)  
The product was obtained as white powder (3.88 g, 65%); m.p. 154-156 \({}^{\circ}\)C. 1H-NMR (400 MHz, DMSO): 8 2.85 (t, \(J\) = 4 Hz, 2H), 3.69 (t, \(J\) = 4 Hz, 2H), 7.49 (t, \(J\) = 4 Hz, 2H), 7.58 (m, 1H), 7.88 (d, \(J\) = 4 Hz, 2H), 10.06 (s, 1H), 10.42 (s, 1H); 13C-NMR (100 MHz, DMSO): 8 28.5, 36.6, 127.4, 128.4, 131.8, 132.3, 165.3, 168.5. HRMS (ESI): \(m/z\) calcd for C\({}_{10}\)H\({}_{11}\)BrN\({}_{2}\)O\({}_{2}\) + H\({}^{+}\): 271.0082, 273.0063; found 271.0089, 273.0066.  
\(N^{\prime}\)-(4-Bromobutanosyl)benzoylhydrazizide (**3d**)  
The product was obtained as white powder (4.34 g, 69%); m.p. 115-117 \({}^{\circ}\)C. 1H-NMR (400 MHz, DMSO): 8 2.08 (q, \(J\) = 8 Hz, 2H), 2.36 (t, \(J\) = 8 Hz, 2H), 3.60 (t, \(J\) = 8 Hz, 2H), 7.51 (t, \(J\) = 8 Hz, 2H), 7.58 (t, \(J\) = 8 Hz, 2H), 7.58 (m, 1H), 7.88 (d, \(J\) = 8 Hz, 2H), 9.93 (s, 1H), 10.30 (s, 1H); 13C-NMR (100 MHz, DMSO): 8 28.3, 31.6, 34.2, 38.9, 127.4, 128.4, 131.8, 132.4, 165.5, 170.5. HRMS (ESI): \(m/z\) calcd for C\({}_{11}\)H\({}_{3}\)BrN\({}_{2}\)O\({}_{2}\) + H\({}^{+}\): 285.0239, 287.0219; found 285.0238, 287.0240.  
\(N^{\prime}\)-(5-Bromopentanoyll)benzoylhydrazizide (**3e**)  
The product was obtained as white powder (4.68 g, 71%); m.p. 133-134 \({}^{\circ}\)C. 1H-NMR (400 MHz, DMSO): 8 1.67 (m, 4H), 2.24 (t, \(J\) = 8 Hz, 2H), 3.57 (t, \(J\) = 8 Hz, 2H), 7.49 (t, \(J\) = 8 Hz, 3H), 7.90 (d, \(J\) = 8 Hz, 2H), 9.93 (s, 1H), 10.32 (s, 1H); 13C-NMR (100 MHz, DMSO): 8 23.7, 31.6, 32.3, 34.8, 127.8, 128.7, 130.4, 132.8, 165.7, 171.2. HRMS (ESI): \(m/z\) calcd for C\({}_{12}\)H\({}_{15}\)BrN\({}_{2}\)O\({}_{2}\) + H\({}^{+}\): 299.0395, 301.0376; found 299.0399, 301.0381.