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UV-vis (CHCl3; lmax, nm (log 3)): 312 (4.70), 422 (5.65), 534
(4.54), 571 (4.28).
4b
1H NMR (CDCl3; d, ppm; J, Hz): 8.82 (s, 2H, Hb), 8.79 (s, 2H, Hb),
8.76 (d, 1H, 3J ¼ 4.9, Hb), 8.75 (d, 1H, 3J ¼ 5.0, Hb), 8.67 (s, 1H,
NH), 7.99 (d, 2H, 3J ¼ 8.1, CHo-Ar), 7.97 (d, 2H, 3J ¼ 7.9, CHo-Ar),
7.91 (d, 4H, 3J ¼ 8.2, CHo-Ar), 7.74 (d, 2H, 3J ¼ 8.0, o-CH), 7.50 (d,
2H, 3J ¼ 8.0, m-CH), 7.37 (d, 2H, 3J ¼ 8.0, CHm-Ar), 7.28 (d, 2H, 3J
¼ 8.2, CHm-Ar), 7.20 (d, 4H, 3J ¼ 8.1, CHm-Ar), 4.33–4.25 (m, 4H,
CH2O), 4.21 (t, 4H, 3J ¼ 6.5, CH2O), 2.05–1.97 (m, 4H, CH2),
1.97–1.90 (m, 4H, CH2), 1.75–1.60 (m, 8H, CH2), 1.39 (s, 9H,
4f
1H NMR (CDCl3; d, ppm; J, Hz): 8.84–8.79 (m, 4H, Hb), 8.78–8.74
(m, 3H, Hb + NH), 8.12 (d, 2H, 3J ¼ 8.0, CHAr), 7.98 (d, 2H, 3J ¼
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8.4, CHAr), 7.97 (d, 2H, J ¼ 8.4 Hz, CHAr), 7.91 (br.d, 4H, J ¼
8.4, CHAr), 7.84 (d, 2H, 3J ¼ 8.0, CHAr), 7.38 (d, 2H, 3J ¼ 8.1, CHm-
Ar), 7.29 (d, 2H, 3J ¼ 8.1, CHm-Ar), 7.20 (d, 4H, 3J ¼ 8.1, CHm-Ar),
4.32–4.26 (m, 4H, CH2O), 4.20 (br.t, 4H, J ¼ 5.8 Hz, CH2O), 3.98
(s, 3H, COOCH3), 2.05–1.97 (m, 4H, CH2), 1.94 (quint., 4H, 3J ¼
tBu), 1.16–1.10 (m, 6H, CH3), 1.09 (t, 6H, J ¼ 7.4, CH3).
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13C NMR (CDCl3; d, ppm): 159.74, 159.19, 159.12, 152.75,
152.05, 151.95, 144.42, 142.59, 142.33, 142.22, 141.68, 141.55,
139.05, 134.96, 134.80, 133.81, 133.27, 132.87, 132.63, 132.38,
131.75, 131.69, 131.62, 129.91, 128.13, 127.10, 126.03, 125.81,
119.52, 119.42, 116.17, 114.37, 113.52, 113.33, 113.06, 68.40,
68.12, 31.73, 31.68, 31.58, 31.38, 29.85, 19.56, 14.11.
MALDI-TOF MS: m/z calcd for C71H72N6NiO4 [M]+1130.50,
found 1130.59.
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6.8, CH2), 1.74–1.61 (m, 8H, CH2), 1.14 (t, 3H, J ¼ 7.4, CH3),
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1.13 (t, 3H, J ¼ 7.4, CH3), 1.09 (t, 6H, J ¼ 7.4, CH3).
13C NMR (CDCl3; d, ppm): 166.76, 159.83, 159.29, 159.16,
152.11, 150.41, 144.39, 142.58, 142.49, 142.33, 141.80, 141.70,
139.38, 134.87, 134.80, 133.79, 133.14, 133.08, 132.98, 132.79,
132.25, 131.91, 131.84, 131.66, 131.48, 130.49, 130.39, 129.97,
126.75, 125.60, 119.73, 119.68, 116.13, 114.42, 113.67, 113.34,
113.08, 68.47, 68.15, 68.12, 52.39, 31.71, 31.67, 31.56, 19.60,
19.57, 19.55, 14.14, 14.10.
UV-vis (CHCl3; lmax, nm; log(3)): 289 (4.54), 423 (5.36), 534
(4.32), 570 (4.06).
MALDI-TOF MS: m/z calcd for C69H66N6NiO6 [M]+ 1132.44,
found 1132.36.
UV-vis (CHCl3; lmax, nm (log 3)): 328 (4.42), 424 (5.35), 534
(4.25), 570 (3.98).
4c
1H NMR (CDCl3; d, ppm; J, Hz): 8.86–8.72 (br.m, 6H, Hb), 8.55
(br.s, 1H, NH), 7.96 (br.s, 4H, CHo-Ar), 7.91 (d, 4H, 3J ¼ 8.1, CHo-
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Ar), 7.62 (d, 2H, J ¼ 8.2, o-CH), 7.32 (br.s, 4H, CHm-Ar), 7.19 (d,
4g
4H, 3J ¼ 8.2, CHm-Ar), 6.83 (d, 2H, 3J ¼ 8.1, m-CH), 4.23 (t, 4H, 3J
1H NMR (CDCl3; d, ppm; J, Hz): 8.88–8.81 (br.m, 4H, Hb), 8.79
(br.s, 3H, Hb + NH), 8.00 (d, 4H, 3J ¼ 8.2, CHo-Ar), 7.97–7.88 (m,
8H, CHo-Ar + o- and m-CH) 7.41 (br.d, 2H, 3J ¼ 7.9, CHm-Ar), 7.31
(br.d, 2H, 3J ¼ 8.1, CHm-Ar), 7.23 (d, 4H, 3J ¼ 8.2, CHm-Ar), 4.35–
4.28 (br.m, 4H, CH2O), 4.23 (t, 4H, 3J ¼ 6.6, CH2O), 4.25–4.12 (m,
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¼ 6.5, CH2O), 4.20 (t, 4H, J ¼ 6.5, CH2O), 1.98–1.90 (m, 8H,
CH2), 1.68–1.59 (m, 8H, CH2), 1.11–1.04 (m, 12H, CH3).
Satisfactory 13C NMR spectrum was not obtained for 4c as
a result of broadening of the most of its signals. The acquired
spectrum is presented in the ESI.†
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4H, CH3CH2O), 2.03 (br.s, 4H, CH2), 1.97 (quint, 4H, J ¼ 6.7,
MALDI-TOF MS: m/z calcd for C67H64N6NiO5 [M]+ 1090.43,
found m/z 1090.43.
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CH2), 1.76–1.70 (br.m, 4H, CH2), 1.66 (sext, 4H, J ¼ 7.5, CH2),
1.40 (t, 6H, 3J ¼ 7.1, CH3CH2O), 1.19–1.13 (br.m, 6H, CH3), 1.11
UV-vis (CHCl3; lmax, nm (log 3)): 281 (4.49), 421 (5.38), 534
(4.26), 570 (4.00).
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(t, 6H, J ¼ 7.4, CH3).
13C NMR (CDCl3; d, ppm): 159.72, 159.15, 159.04, 151.94,
150.19, 144.26, 142.45, 142.37, 142.21, 141.68, 141.58, 139.24,
134.74, 134.67, 134.37 (d, 1JC–P ¼ 3.2 Hz), 133.66, 133.01, 132.96,
132.87, 132.67, 132.53, 132.47, 132.14, 131.80, 131.73, 131.53,
131.34, 129.85, 129.56, 128.30, 126.61, 125.62, 125.52, 119.59 (d,
2JC–P ¼ 7.5 Hz), 115.99, 114.28, 113.54, 113.21, 112.96, 68.35,
68.00, 62.30 (d, 2JC–P ¼ 5.3 Hz), 31.59, 31.55, 31.44, 19.46, 19.42,
4e
1H NMR (CDCl3; d, ppm; J, Hz): 8.85–8.79 (m, 4H, Hb), 8.79–8.74
(m, 2H, Hb), 8.70 (s, 1H, NH), 8.26 (d, 2H, 3J ¼ 7.6, CHo-Bz), 8.03–
7.96 (m, 4H, CHo-Ar) 7.92 (d, 4H, 3J ¼ 8.1, CHo-Ar), 7.86 (d, 2H, 3J
¼ 8.2, o-CH), 7.68 (t, 1H, 3J ¼ 7.6, CHp-Bz), 7.56 (t, 2H, J ¼ 7.6,
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16.38 (d, JC–P ¼ 6.4 Hz), 14.01, 13.97.
CHm-Bz), 7.38 (d, 2H, J ¼ 8.0, CHm-Ar), 7.34 (d, 2H, J ¼ 8.3, o-
CHAr), 7.29 (d, 2H, 3J ¼ 8.1, CHm-Ar), 7.21 (d, 4H, 3J ¼ 8.1, CHm-
Ar), 4.32–4.25 (m, 4H, CH2O), 4.21 (t, 4H, 3J ¼ 6.5, CH2O), 2.03–
1.96 (m, 4H, CH2), 1.94 (quint, 4H, 3J ¼ 6.5, CH2), 1.72–1.60 (m,
8H, CH2) 1.15–1.06 (m, 12H, CH3).
31P NMR (CDCl3; d, ppm): 18.04 (s).
MALDI-TOF MS: m/z calcd for C71H73N6NiO7P [M]+ 1210.46,
found 1210.27.
UV-vis (CHCl3; lmax, nm (log 3)): 319 (4.51), 424 (5.43), 534
(4.32), 569 (4.05).
13C NMR (CDCl3; d, ppm): 165.04, 159.67, 159.10, 159.01,
151.89, 151.77, 150.92, 144.28, 142.50, 142.28, 142.15, 141.62,
141.51, 139.09, 134.80, 134.68, 133.81, 133.67, 133.10, 133.02,
4h
132.79, 132.57, 132.23, 131.69, 131.64, 131.51, 131.46, 130.30, 1H NMR (20% MeOD in CDCl3; d, ppm; J, Hz): 8.71–8.66 (br.s,
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129.84, 129.42, 128.69, 128.62, 127.10, 126.84, 122.35, 119.48, 4H, Hb), 8.64 (s, 2H, Hb), 8.04 (d, 2H, J ¼ 8.0, m-CH), 7.86 (d,
119.40, 116.04, 114.25, 113.48, 113.20, 112.94, 68.29, 68.00, 4H, 3J ¼ 8.1, CHo-Ar), 7.79 (d, 4H, 3J ¼ 8.2, CHo-Ar), 7.75 (d, 2H, 3J
31.55, 31.44, 19.43, 13.98.
¼ 8.0, o-CH), 7.27 (br.s, 2H, CHm-Ar), 7.18 (br.s, 2H, CHm-Ar), 7.09
MALDI-TOF MS: m/z calcd for C74H68N6NiO6 [M]+ 1194.46, (d, 4H, 3J ¼ 8.2, CHm-Ar), 4.18 (br.t, 4H, 3J ¼ 6.5, CH2O), 4.10 (t,
found m/z 1194.50.
4H, 3J ¼ 6.5, CH2O), 1.93–1.85 (br.m, 4H, CH2), 1.82 (quint, 4H,
RSC Adv., 2020, 10, 42388–42399 | 42395
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