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. 2016 Dec 7;1(6):1149–1156. doi: 10.1021/acsomega.6b00289

Figure 3.

Figure 3

Synthesis of dyes 2–5. (a) Pd(PPh3)4, DMF, reflux, 16 h, 63% for 2, 70% for 3; (b) PdCl2(PPh3)2, CuI, toluene/Et3N (v/v 4:1), 100 °C, 20 h, 35%; (c) (i) 13, n-BuLi, trimethylborate, −78 °C, r.t., 24 h and (ii) 18, ethylene glycol, Pd(PPh3)4, 2 N Na2CO3, reflux, 36 h, 28%.