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S. Sengupta, S. Muhuri / Tetrahedron Letters 45 (2004) 2895–2898
3. (a) Martin, R. E.; Diederich, F. Angew. Chem., Int. Ed.
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P.; Ostrowski, J. C.; Sukhomlinova, L.; Twieg, R. J.;
Bazan, G. C.; Goodson, T., III. J. Am. Chem. Soc. 2002,
1999, 38, 1350; (b) Segura, J. L.; Martın, N. J. Mater.
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124, 1736; (g) Zimmermann, T. J.; Muller, T. J. J. Eur. J.
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Sengupta, S.; Sadhukhan, S. K. Indian J. Chem. 2003, 42B,
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Kolb, U. Chem. Eur. J. 2000, 6, 2462; (d) Dıez-Barra, E.;
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Spangler, C. W.; Elandaloussi, E. H.; Reeves, B. Polym.
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1997; (b) Sengupta, S.; Sadhukhan, S. K. J. Chem. Soc.,
Perkin Trans. 1 2000, 4332.
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
9. 3: mp 206–207 ꢁC; IR (KBr, cmꢃ1) 3400, 1605, 1500, 1460,
1370; 1H NMR (300 MHz, CDCl3/TMS) d 2.33 (s, 9H),
6.65 (dd, 3H, J ¼ 8:4, 2.1 Hz), 6.70 (d, 2H, J ¼ 6:6 Hz),
6.99 (d, 2H, J ¼ 6:6 Hz), 7.02 (d, 3H, J ¼ 2:1 Hz), 7.65 (d,
3H, J ¼ 8:4 Hz); 13C NMR (75 MHz, CDCl3) d 28.2, 63.3,
98.7, 114.5, 130.1, 131.9, 138.0, 140.5, 146.5, 153.6.
10. Jeffery, T. Tetrahedron 1996, 52, 10113.
ꢀ
Prepr. 2000, 41, 789; (f) Segura, J. L.; Gomez, R.; Martın,
N.; Guldi, D. M. Org. Lett. 2001, 3, 2645; (g) Segura, J. L.;
ꢀ
ꢀ
Gomez, R.; Martın, N.; Luo, C.; Swartz, A.; Guldi, M.
Chem. Commun. 2001, 707; (h) Langa, F.; Gomez-Escal-
ꢀ
ꢀ
ꢀ
onilla, M. J.; Dıez-Barra, E.; Garcıa-Martınez, J. C.; de la
Hoz, A.; Rodrıguez-Lopez, J.; Gonzales-Cortes, A.;
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Lopez-Arza, V. Tetrahedron Lett. 2001, 42, 3435; (i)
ꢀ
11. 4a: mp 201–202 ꢁC; IR (KBr, cmꢃ1) 3290, 1595, 1500,
ꢀ
1
ꢀ
ꢀ
Dıez-Barra, E.; Garcıa-Martınez, J. C.; Merino, S.; del
Rey, R.; Rodrıguez-Lopez, J.; Sanchez-Verdu, P.; Tejeda,
1445, 1260; H NMR (300 MHz, CDCl3/TMS) d 2.35 (s,
ꢀ
ꢀ
ꢀ
ꢀ
9H), 6.73 (d, 2H, J ¼ 8:7 Hz), 7.00 (d, 3H, J ¼ 16:2 Hz),
7.05–7.11 (m, 6H), 7.14 (d, 2H, J ¼ 8:7 Hz), 7.20–7.31 (m,
6H), 7.34 (d, 3H, J ¼ 5:4 Hz), 7.35 (d, 3H, J ¼ 16:2 Hz),
7.45–7.54 (m, 9H); 13C NMR (75 MHz, CDCl3) d 20.2,
63.7, 114.3, 124.4, 126.1, 126.5, 127.4, 128.6, 129.1, 129.7,
132.2, 132.7, 133.7, 134.7, 137.8, 139.2, 146.3, 153.4. 4b:
mp 220–224 ꢁC; IR (KBr, cmꢃ1) 3300, 1600, 1510, 1440,
J. J. Org. Chem. 2001, 66, 5664; (j) Lupton, J. M.; Samuel,
€
I. D. W.; Beavington, R.; Burn, P. L.; Bassler, H. Synth.
Met. 2001, 116, 357; (k) Meskers, S. C. J.; Bender, M.;
Hubner, J.; Romanovskii, Y. V.; Oestereich, M.; Schen-
€
ning, A. P. H. J.; Meijer, E. W.; Bassler, H. J. Phys. Chem.
A 2001, 105, 10220; (l) Sengupta, S.; Sadhukhan, S. K.;
Singh, R. S.; Pal, N. Tetrahedron Lett. 2002, 43, 1117.
5. (a) Conwell, E. Trends Polym. Sci. 1997, 5, 218; (b) Cornil,
1
1280; H NMR (300 MHz, CDCl3/TMS) d 1.33 (s, 27H),
2.34 (s, 9H), 4.67 (br s, 1H), 6.72 (d, 2H, J ¼ 8:5 Hz), 6.98
(d, 3H, J ¼ 16 Hz), 7.04–7.11 (m, 6H), 7.14 (d, 2H,
J ¼ 8:3 Hz), 7.26 (d, 3H, J ¼ 16 Hz), 7.37 (d, 6H,
J ¼ 8:2 Hz), 7.45 (d, 6H, J ¼ 8:8 Hz), 7.48 (d, 3H,
J ¼ 9:2 Hz). 6: mp >250 ꢁC; calcd for C204H216O3 (MW
2712): C, 90.26; H, 7.96. Found: C, 90.42; H, 7.77; IR
(KBr, cmꢃ1) 2870, 1624, 1605, 1500, 1445, 1280; 1H NMR
(300 MHz, CDCl3/TMS) d 1.25 (s, 81H), 2.27 (s, 27H),
2.39 (s, 9H), 5.18 (s, 6H), 6.85 (d, 6H, J ¼ 8:5 Hz), 6.90 (d,
9H, J ¼ 16:2 Hz), 7.02–7.11 (m, 18H), 7.15 (d, 6H,
J ¼ 8:4 Hz), 7.19 (d, 9H, J ¼ 16 Hz), 7.29 (d, 18H,
J ¼ 8:4 Hz), 7.37 (d, 18H, J ¼ 8:4 Hz), 7.41 (d, 9H,
J ¼ 9 Hz); MS (MALDI-TOF) m=z 2713 (M+1).
12. (a) Hennrich, G.; Anslyn, E. V. Chem. Eur. J. 2002, 8,
2219; (b) Kumar, S.; Kaur, S.; Singh, G. Supramol. Chem.
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Martini, I. B.; Liu, J.; Schwartz, B. J. J. J. Phys. Chem.
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L. Adv. Mater. 1999, 11, 371; (b) Pillow, J. N. G.; Burn, P.
L.; Samuel, I. D. W.; Halim, M. Synth. Met. 1999, 102,
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7. (a) Oldham, W. J., Jr.; Lachicotte, R. J.; Bazan, G. C.
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13. (a) Eldin, S.; Liebman, J. F.; Reynolds, L. D.; Dowd,
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