2.2.3. 2-(2,4-Dibutoxybenzylidene)-1*H*-Cyclopenta[*b*]Naphthalene-1,3(2*H*)-Dione **PP3**

2,4-Dibutoxybenzaldehyde (0.64 g, 2.55 mmol), mexp = 0.95 g, 2.22 mmol, 87% yield. 1H nmR (CDCl3) δ: 1.00 (t, 3H, J = 7.4 Hz), 1.04 (t, 3H, J = 7.4 Hz), 1.49–1.63 (m, 4*H*), 1.82 (qt, 2*H*, J = 7.7 Hz), 1.91 (qt, 2*H*, J = 6.4 Hz), 4.09 (t, 4*H*, J = 6.2 Hz), 6.44 (d, 1*H*, J = 0.9 Hz), 6.64 (dd, 1*H*, J = 11.0 Hz, J = 0.9 Hz), 7.64–7.67 (m, 2*H*), 8.06–8.09 (m, 2*H*), 8.44 (s, 2*H*), 8.62 (s, 1*H*), 9.37 (d, 1*H*, J = 9.0 Hz); 13C nmR (CDCl3) δ: 13.77, 13.83, 19.17, 19.32, 31.04-31.13, 68.2, 68.7, 98.8, 106.2, 116.5, 123.44, 123.48, 127.1, 128.7, 128.8, 130.3, 130.4, 135.8, 136.3, 136.4, 136.9, 137.7, 142.4, 163.1, 166.6, 189.5, and 191.0; HRMS (ESI MS) m/z: theor: 428.1988 found: 428.1986 ([M]+. detected).

2.2.4. 2-(4-(Dimethylamino)Benzylidene)-1*H*-Cyclopenta[*b*]Naphthalene-1,3(2*H*)-Dione **PP4**

4-Dimethylaminobenzaldehyde (0.38 g, 2.55 mmol), mexp = 0.62 g, 1.89 mmol, 74% yield. 1H nmR (CDCl3) δ: 3.16 (s, 6*H*), 6.74 (d, 2*H*, J = 9.0 Hz), 7.62–7.64 (m, 2*H*), 7.87 (s, 1*H*), 8.05–8.06 (m, 2*H*), 8.39 (d, 2*H*, J = 2.6 Hz), 8.61 (d, 2*H*, J = 8.6 Hz); 13C nmR (CDCl3) δ: 40.1, 111.5, 122.4, 122.9, 123.1, 125.1, 128.5, 128.6, 130.2, 130.3, 135.9, 136.1, 136.3, 137.8, 138.5, 148.5, 154.3, 189.6, and 191.4; HRMS (ESI MS) m/z: theor: 327.1259 found: 327.1260 ([M]+. detected).

2.2.5. 2-(2-Butoxy-4-(Diethylamino)Benzylidene)-1*H*-Cyclopenta[b]Naphthalene-1,3(2*H*)-Dione **PP5**

2-Butoxy-4-(diethylamino)benzaldehyde (0.63 g, 2.55 mmol), mexp = 1.02 g, 2.38 mmol, 94% yield. 1H nmR (CDCl3) δ: 1.04 (t, 3*H*, J = 7.4 Hz), 1.28 (t, 6*H*, J = 7.1 Hz), 1.60 (qt, 2*H*, J = 7.4 Hz), 1.92 (qt, 2*H*, J = 7.8 Hz), 3.50 (q, 4*H*, J = 7.1 Hz), 4.08 (t, 2*H*, J = 6.4 Hz), 6.03 (d, 1*H*, J = 2.0 Hz), 6.43 (dd, 1*H*, J = 9.3 Hz, J = 2.0 Hz), 7.59–7.62 (m, 2H), 8.03–8.05 (m, 2*H*), 8.34 (s, 2*H*), 8.58 (s, 1*H*), 9.50 (d, 1*H*, J = 9.3 Hz); 13C nmR (CDCl3) δ: 12.8, 13.9, 19.4, 31.1, 45.1, 68.2, 93.1, 105.1, 113.2, 122.37, 122.40, 123.1, 128.1, 128.2, 130.1, 130.2, 136.08, 136.11, 136.3, 137.8, 138.0, 155.2, 164.1, 189.8, and 191.9; HRMS (ESI MS) m/z: theor: 427.2147 found: 427.2149 ([M]+. detected).

2.2.6. 2-(4-(Diphenylamino)Benzylidene)-1*H*-Cyclopenta[*b*]Naphthalene-1,3(2*H*)-Dione **PP6**

4-(Diphenylamino)benzaldehyde (0.70 g, 2.55 mmol), mexp = 1.02 g, 2.26 mmol, 89% yield. 1H nmR (CDCl3) δ: 7.02 (d, 2*H*, J = 8.9 Hz), 7.20–7.24 (m, 6*H*), 7.38 (t, 4*H*, J = 8.2 Hz), 7.65–7.67 (m, 2*H*), 7.88 (s, 1*H*), 8.07–8.09 (m, 2*H*), 8.44 (d, 2*H*, J = 7.7 Hz), 8.50 (d, 2*H*, J = 8.9 Hz); 13C nmR (CDCl3) δ: 118.7, 123.50, 123.56, 125.7, 126.0, 126.7, 127.2, 128.8, 128.9, 129.8, 130.3, 130.4, 135.8, 136.3, 136.4, 137.3, 137.7, 145.6, 147.6, 153.1, 189.4, and 191.0; HRMS (ESI MS) m/z: theor: 451.1572 found: 451.1574 ([M]+. detected).

2.2.7. 2-(2-Butoxy-4-(Diethylamino)Benzylidene)-1*H*-Cyclopenta[*b*]Naphthalene-1,3(2*H*)-Dione **PP7**

4-(*Bis*(4-bromophenyl)amino)benzaldehyde (1.1 g, 2.55 mmol, M = 431.13 g/mol), mexp = 1.42 g, 2.33 mmol, 92% yield. 1H nmR (CDCl3) δ: 7.03–7.08 (m, 6*H*), 7.48 (d, 4*H*, J = 8.7 Hz), 7.66–7.69 (m, 2*H*), 7.88 (s, 1*H*), 8.07–8.11 (m, 2*H*), 8.46–8.52 (m, 4*H*); 13C nmR (CDCl3) δ: 118.6, 119.8, 123.78, 123.82, 127.1, 127.7, 128.2, 128.98, 129.08, 133.0, 135.7, 136.4, 136.5, 137.0, 137.6, 144.7, 147.0, 151.9, 189.3, and 190.7; HRMS (ESI MS) m/z: theor: 606.9783 found: 606.9787 ([M]+. detected).

2.2.8. 2-((9-Methyl-9H-Carbazol-3-Yl)Methylene)-1*H*-Cyclopenta[*b*]Naphthalene-1,3(2*H*)-Dione **PP8**

9-Methyl-9*H*-carbazole-3-carbaldehyde (0.53 g, 2.55 mmol), mexp = 0.84 g, 2.17 mmol, 85% yield. 1H nmR (CDCl3) δ: 3.91 (s, 3*H*), 7.37 (t, 1*H*, J = 6.7 Hz), 7.43 (d, 1*H*, J = 7.8 Hz), 7.48 (d, 1*H*, J = 8.7 Hz), 7.53 (t, 1*H*, J = 7.3 Hz), 7.66–7.69 (m, 2*H*), 8.05–8.12 (m, 2*H*), 8.20 (s, 1*H*), 8.28 (d, 1*H*, J = 7.3 Hz), 8.48 (d, 2*H*, J = 7.6 Hz), 8.76 (d, 1*H*, J = 8.0 Hz); 13C nmR (CDCl3) δ: 29.4, 108.8, 109.2, 120.8, 121.0, 123.2, 123.66, 123.68, 123.7, 125.3, 126.8, 127.5, 128.8, 128.9, 129.0, 130.38, 130.40, 133.9, 135.7, 136.3, 136.5, 137.8, 141.7, 144.5, 149.9, 189.5, and 190.9; HRMS (ESI MS) m/z: theor: 387.1259 found: 387.1263 ([M]+. detected).

2.2.9. 2-(3-(4-(Dimethylamino)Phenyl)Allylidene)-1*H*-Cyclopenta[*b*]Naphthalene-1,3(2*H*)-Dione **PP9**

3-(4-(Dimethylamino)phenyl)acrylaldehyde (0.45 g, 2.55 mmol), mexp = 756 mg, 2.14 mmol, 84% yield. 1H nmR (CDCl3) δ: 3.10 (s, 6*H*), 6.70 (d, 2H, J = 8.4 Hz), 7.36 (d, 1*H*, J = 15.1 Hz), 7.61–7.75 (m, 4*H*), 7.73 (d, 1*H*, J = 12.3 Hz), 8.03–8.07 (m, 2*H*), 8.34–8.39 (m, 3*H*); 13C nmR (CDCl3) δ: 40.1, 111.9, 119.8, 122.9, 123.3, 123.8, 126.3, 128.66, 128.72, 130.30, 130.35, 131.7, 136.2, 136.3, 136.5, 137.6, 147.6, 152.8, 154.8, 190.6, and 190.9; HRMS (ESI MS) m/z: theor: 353.1416 found: 353.1414 ([M]+. detected).
