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1.1 Porphyrins - Friedrich-Alexander-Universität Erlangen-Nürnberg

1.1 Porphyrins - Friedrich-Alexander-Universität Erlangen-Nürnberg

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6 Experimental Section<br />

6.2.5.15 5 4 ,10 4 ,15 4 ,20 4 -Tetra-t-Butyl-5 2 ,5 6 ,15 2 ,15 6 -Tetrakis-(Cyanomethyl)-5,10,15,20-<br />

NC<br />

176<br />

Tetraphenylporphyrin, 78<br />

According to GP I, bromomethyl porphyrin 49 (320 mg,<br />

264 μmol) is subjected to the following setup: a.: CH2Cl2<br />

(50 mL), Zn(OAc)2·2 H2O (<strong>1.1</strong>6 g, 5.29 mmol, 20 eq.); b.: KCN<br />

(1.72 g, 26.4 mmol, 100 eq.), PEG 400 (75 mL). Final FC over<br />

silica with an eluent mixture of CH2Cl2 and ethyl acetate<br />

(10 : 1) furnishes pure 78 (236 mg, 237 μmol) as a dark purple<br />

powder, equiv. to 89.7 % yield based on 49.<br />

1 H NMR (400 MHz, rt, CDCl3): δ [ppm] = -2.62 (s, 2 H, NH), 1.63 (s, 18 H, t-BuH), 1.67 (s, 18 H,<br />

t-BuH), 3.29 (s, 8 H, CH2), 7.80 (d, 3 J = 8.3 Hz, 4 H, ArH), 8.00 (s, 4 H, Ar’H), 8.15 (d, 3 J = 8.3 Hz,<br />

4 H, ArH), 8.58 (d, 3 J = 4.8 Hz, 4 H, β-H), 8.98 (d, 3 J = 4.8 Hz, 4 H, β-H).<br />

13 C NMR (100.5 MHz, rt, CDCl3): δ [ppm] = 23.2, 31.5, 31.6, 34.9, 35.4, 112.5, 117.4, 121.6,<br />

123.9, 124.9, 129.2 (br), 132.5, 133.4 (br), 134.5, 137.4, 137.8, 15<strong>1.1</strong>, 153.9.<br />

MS (FAB+, NBA): m/z (%) = 995 (100) [M] +· .<br />

IR (ATR): 𝜈� [cm -1 ] = 3320, 2962, 2905, 2870, 1610, 1563, 1506, 1476, 1399, 1365, 1352, 1271,<br />

1222, 1210, 1186, 1155, 1111, 1077, 1027, 993, 981, 967, 930, 875, 847, 807, 741, 726.<br />

UV/Vis (CH2Cl2): λ [nm] (ε [M -1 ·cm -1 ]) = 421 (423000), 516 (18100), 551 (6300), 593 (5500),<br />

647 (2900).<br />

CN<br />

N<br />

NH HN<br />

N<br />

NC<br />

78<br />

C 68 H 66 N 8<br />

M = 995.31 g·mol -1<br />

CN<br />

EA: C68H66N8·1.5 H2O. Calc.: C 80.60, H 6.76, N 11.06; found: C 80.78, H 6.74, N 11.02.

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