## 3 Experimental Section
### Analytical Data  
**Compound 7**: same as below: The solvent was removed _in vacuo_ to give compound 7 as a solid (6 mg, 0.039 mmol, 77%). 1H-NMR (400 MHz; CDCl\({}_{3}\)): \(\partial\) 7.49 (t, \(J\) = 5.9, 2H), 7.34-7.26 (m, 3H), 4.45 (s, 2H), 1.94 (s, 1H); GCMS (R\({}_{\rm t}\) = 9.20 min) calculated for C\({}_{11}\)H\({}_{\rm SO}\) 156.1, found 156.2. **Compound 8**: The solvent was removed _in vacuo_ to give compound 8 as a solid (5 mg, 0.034 mmol, 67%) 1H-NMR (400 MHz; CDCl\({}_{3}\)): \(\partial\) 4.32 (s, 2H), 2.29 (t, \(J\) = 6.8 Hz, 3H), 1.52 (m, 2H), 1.42 (sextet, \(J\) = 7.2 Hz, 2H), 0.91 (t, \(J\) = 7.23 Hz, 3H); GCMS (R\({}_{\rm t}\) = 7.29 min) calculated for C\({}_{9}\)H\({}_{12}\)O 136.1, found 136.0. **Compound 9**: The solvent was removed _in vacuo_ to give compound 9 as a solid (7 mg, 0.038 mmol, 75%) 1H-NMR (400 MHz; CDCl\({}_{3}\)): \(\partial\) 7.44 (d, \(J\) = 7.6 Hz, 2H), 6.85 (d, \(J\) = 7.6, 2H), 4.14 (s, 2H), 3.82 (s, 3H); GCMS (R\({}_{\rm t}\) = 9.93 min) calculated for C\({}_{12}\)H\({}_{10}\)O\({}_{2}\) 186.1, found 186.2. **Compound 10**: The solvent was removed _in vacuo_ to give compound 10 as a solid (7 mg, 0.045 mmol, 90%). 1H-NMR (400 MHz; CDCl\({}_{3}\)): \(\partial\) 8.01 (d, \(J\) = 7.5 Hz, 1H), 7.65 (t, \(J\) = 7.4 Hz, 1H), 7.32 (t, \(J\) = 7.5 Hz, 1H), 6.91 (d, \(J\) = 7.4 Hz, 1H), 4.38 (s, 2H). GCMS (R\({}_{\rm t}\) = 8.77 min) calculated for C\({}_{10}\)H\(\gamma\)NO 157.1, found 157.2. **Compound 11**: The solvent was removed _in vacuo_ to give compound 11 as a solid (5 mg, 0.046 mmol, 92%). Using 7 as a starting material (3.5 mg, 0.032 mmol, 91%). 1H-NMR (400 MHz; CD\({}_{3}\)OD): \(\partial\) 5.21 (s, 2H), 4.35 (s, 2H), 3.39 (s, 2H); GCMS (R\({}_{\rm t}\) = 6.01 min) calculated for C\({}_{6}\)H\(\gamma\)NO 109.1, found 109.1. **Compound 12**: The solvent was removed _in vacuo_ to give compound 12 as a solid (5 mg, 0.045 mmol, 90%). 1H-NMR (400 MHz; CDCl\({}_{3}\)): \(\partial\) 4.36 (s, 4H); GCMS (R\({}_{\rm t}\) = 7.88 min) calculated for C\({}_{6}\)H\({}_{6}\)O\({}_{2}\) 110.0, found 110.1. **Compound 13**: The solvent was removed _in vacuo_ to give compound 13 as a solid. (9 mg, 0.039 mmol, 78%). 1H-NMR (400 MHz; CDCl\({}_{3}\)): \(\delta\) 7.53 (d, \(J\) = 7.5 Hz, 4H), 7.45 (t, \(J\) = 7.5 Hz, 4H), 7.30 (m, \(J\) = 7.5, 5H), 4.74 (s, 2H); GCMS (R\({}_{\rm t}\) = 10.75 min) calculated for C\({}_{17}\)H\({}_{12}\)O\({}_{2}\) 232.1, found 232.1. **Compound 14**: The solvent was removed _in vacuo_ to give compound 14 as a solid. (4 mg, 0.019 mmol, 38%). 1H-NMR (400 MHz; CDCl\({}_{3}\)): \(\delta\) 7.52 (d, \(J\) = 7.5 Hz, 2H), 7.31 (d, \(J\) = 7.4 Hz, 2H), 4.73 (s, 2H), 2.32 (t, \(J\) = 7.1 Hz, 2H), 1.56 (quintet, \(J\) = 7.1 Hz, 2H), 1.42 (m, 2H), 0.95 (t, \(J\) = 7.1 Hz, 3H); GCMS (R\({}_{\rm t}\) = 9.85 min) calculated for C\({}_{15}\)H\({}_{16}\)O 212.1, found 212.2. **Compound 15**: The solvent was removed _in vacuo_ to give compound 15 as a solid. (10 mg, 0.038 mmol, 76%). 1H-NMR (400 MHz; CDCl\({}_{3}\)): \(\delta\) 7.53 (d, \(J\) = 7.5 Hz, 2H), 7.30 (d, \(J\) = 7.5 Hz, 2H), 7.40 (d, \(J\) = 7.5 Hz, 2H), 6.95 (d, \(J\) = 7.5 Hz, 2H), 4.65 (s, 2H), 3.96 (s, 3H); GCMS (R\({}_{\rm t}\) = 13.10 min) calculated for C\({}_{18}\)H\({}_{14}\)O\({}_{2}\) 262.1, found 262.1. **Compound 16**: The solvent was removed _in vacuo_ to give compound 16 as a solid. (10 mg, 0.043 mmol, 86%). 1H-NMR (400 MHz; CDCl\({}_{3}\)): \(\delta\) 7.61 (t, \(J\) = 8.6 Hz, 1H), 7.55 (t, \(J\) = 8.6 Hz, 1H), 7.53 (d,\(J=7.3\) Hz, 2H), 7.40 (d, \(J=7.4\) Hz, 1H), 7.31 (d, \(J=7.3\) Hz, 2H), 7.25 (s, 1H), 4.65 (s, 2H); GCMS (R\({}_{\rm t}=10.75\) min) calculated for C\({}_{6}\)H\({}_{11}\)NO 233.1, found 233.3. **Compound 17**: The solvent was removed _in vacuo_ to give compound 17 as a solid. (8 mg, 0.043 mmol, 86%). \({}^{1}\)H-NMR (400 MHz; CDCl\({}_{3}\)): \(\delta\) 7.40 (d, \(J=7.5\) Hz, 2H), 7.33 (d, \(J=7.5\) Hz, 2H), 4.61 (s, 2H), 3.28 (s, 2H). GCMS (R\({}_{\rm t}=9.92\) min) calculated for C\({}_{12}\)H\({}_{11}\)NO 185.1, found 185.2.