US 8,449,985 B2  50  49  Characterization:  GPC (polystyrene standards): Mw=49.900, PD=2.1  $^{1}$H NMR (CDCl 3 , ppm): chemical shifts are very broad  $^{13}$C NMR (CDCl3, ppm): 151.26 (2C), 144.53 (6C),  127.17 ( 4C), 125.13 ( 4C), 123.55 (6C), 114.77-110.99 (2C),  66.93 (IC), 58.00 (IC), 55.57 (IC), 49.64 (5C), 39.13 (IC),  37.30 (IC), 36.42 (IC), 31.57 (3C), 29.80 (IC), 28.86 (6C),  27.80 (IC), 24.55 (IC), 22.53 (2C), 22.42 (6C), 19.54 (IC),  13.90 (2C)  UVVis:  "-max  =302 nm  FT-IR (u, cm- 1 ): 2954, 2925, 2853, 1508, 1464, 1405,  1214, 1045, 744  Conversion of the Precursor Co-Polymer of Example  12 into a Conjugated Co-Polymer Comprising  Iptycenylene Vinylene and Phenylene Vinylene Units  The precursor polymer of example 12 was solved in chlo- robenzene. The solution was left to react at 120°  C. for 2 h in  the presence of Ar and afterwards cooled down. The solution  was concentrated under vacuo, redissolved in CH$_{2}$Cl$_{2 }$ and  precipitated in cold MeOH to lead a conjugated co-polymer  of the following formula:  synthesized and characterized as described in the article:  Title: Highly selective route to unsymmetrically substituted  1-{ 2-[ (butylsulfanyl)methyl]-5-( chloromethyl)-4-methox› yphenoxy }-3, 7 -dimethy !octane and isomers toward syn the- sis of conjugated polymer OCl Cl0 used in LEDs: Synthesis  and optimizationAuthor(s): Lutsen, L J; van Breemen, A J;  Kreuder,  W.  et al. Source: HELVETICA CHIMICA ACTA  Volume: 83 Issue: 12 Pages: 3113-3121 Published: 2000.  Equal amounts of mo! of l-bromomethyl-4-(n-oethylsul- foxymethyl)-9, 1O-dihydro-9,10-o-benzenoanthracene  and  1-[2-[ ( octylsulfinyl)methyl]-5-(bromo  methyl)-4-methox› yphenoxy ]-3, 7-dimethyloctane were dissolved in s-butanol.  An excess of base (1.3 eq) was also dissolved in s-butanol,  flushed for 1 h with Ar and added in one go at 30°  C. The  mixture was left to react at 30°  C. for 1 h under Ar-flow, before  doing a precipitation in ice water. The water was neutralized  with HCI (IN), extracted with CHCl$_{2 }$ and solvent was  removed. The yellow oily precursor polymer was precipitated  in MeOH at 0°  C., filtered off and dried.  This lead to the following precursor polymer in 84% yield:  0  Br  s  //  -o  0  Example 13 