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Correction to: One-step templated synthesis of chiral organometallic salicyloxazoline complexes

BMC Chemistry201913:63

https://doi.org/10.1186/s13065-019-0577-8

  • Received: 17 April 2019
  • Accepted: 17 April 2019
  • Published:

The original article was published in BMC Chemistry 2019 13:51

Correction to: BMC Chem (2019) 13:51 https://doi.org/10.1186/s13065-019-0565-z

Following publication of the original article [1], the authors reported an error in Schemes 1 and 2 and repeated line in subsection “Bis(ligand) nickel(II) chelate (NiL12)”.

Please see below for the revised Schemes 1 and 2 and the corrected paragraph.
Scheme 1
Scheme 1

Templated synthesis of complexes 14

Scheme 2
Scheme 2

Effect of different solvents on the formation of complexes 3 and 5

Bis(ligand) nickel (II) chelate (NiL12)

Prepared using the procedure described for compound 1 by refluxing a mixture of 2-cyanophenol (2.3001 g, 19.33 mmol), Ni(OAc)2·4H2O (2.4528 g, 9.86 mmol) or NiCl2·6H2O (2.4374 g, 10.25 mmol) and d-phenylglycinol (4.2318 g) in 40 mL of dry chlorobenzene for 60 h. The product was obtained as dark brown crystals (2.5112 g in 92% yield or 2.6949 g) in 95% yield after column chromatography (petroleum ether/CH2Cl2, 4/1). m.p.: 196–198 °C, \( \left[\upalpha \right]_{\text{D}}^{25} \) = + 119.57° (c = 0.0488, CH3OH), 1H NMR (600 MHz, CDCl3 and DMSO, 27°C): 7.85–7.86 (m, 2H), 7.22–7.49 (m, l2H), 6.46(d, J = 7.3 Hz, 2H), 6.30 (t, J = 6.4 Hz, 2H), 5.70–5.98 (m, 2H), 4.54–4.62 (m, 2H), 4.32–4.41 (m, 2H); δC (150 MHz, CDCl3): 164.5, 164.4, 142.3, 133.5, 127.3, 126.0, 125.7, 124.3, 113.1, 107.8, 107.7(× 2), 72.6, 72.5, 67.0, 65.1, 65.0. νmax (cm−1): 3453, 3024, 2906, 1617, 1541, 1475, 1447, 1394, 1349, 1265, 1231, 1154, 1077, 1029, 949, 931, 85,5, 755, 695, 574, 533, 415. Elemental analysis for C30H24N2O4Ni requires C: 67.32%, H: 4.52%, N: 5.23%; found: C: 67.22%, H: 4.39%, N: 5.26%.

Tri(ligand) cobalt chelate (CoL13)

Prepared using the procedure described for compound 1 by refluxing a mixture of 1.5671 g of Co(OAc)2·4H2O (6.29 mmol), 2-cyanophenol (1.7699 g, 14.86 mmol) and d-phenylglycinol (3.6798 g) in 40 mL of dry chlorobenzene for 60 h. The product was obtained in 70% yield (2.5424 g) as dark brown crystals after column chromatography (petroleum ether/CH2Cl2, 4/1). m.p.: 174–176 °C, [α]5D = − 1014.1° (0.0212, CH3OH), δH(600 MHz, CDCl3, 27 °C) 7.50–7.52 (m, 1H), 7.23–7.24 (m, 1H), 7.02–7.07 (m, 2H), 6.87–6.97 (m, 9H), 6.74–6.80(m, 7H), 6.56 (d, J = 8.56 Hz, 1H), 6.45–6.49 (m, 3H), 6.41 (d, J = 8.5 Hz, 1H), 6.24–6.27 (m, 2H), 5.45–5.48 (m, 1H), 5.29–5.32 (m, 1H), 4.91–4.92 (m, 2H), 4.79–4.82 (m, 2H), 4.33–4.36 (m, 1H), 4.26–4.28 (m, 2H); δC (150 MHz, CDCl3) 170.1, 170.0, 168.9, 166.2, 165.3, 164.8, 140.3,139.8, 133.1(× 2), 132.3, 128.1, 128.0, 127.7,127.5, 127.4, 127.1, 126.8, 125.3, 124.4, 123.7, 122.9, 113.9, 113.5, 113.1), 112.9, 109.2, 107.6, 76.3, 75.8, 75.2, 66.8, 66.1, 63.8.νmax (cm−1): 3448, 3061,1617, 1583, 1541, 1468, 1455, 1442, 1396, 1347, 1265,1225, 1152, 1078, 949, 931, 856, 756, 747, 728, 696, 593, 577, 545, 409. Elemental analysis for C46H38Cl2N3O6Co requires C: 64.34%, H: 4.46, N: 4.89%; found: C: 64.48%, H: 4.27, N: 4.90%.

Notes

Declarations

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Authors’ Affiliations

(1)
College of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, China
(2)
Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China
(3)
Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599-7568, USA
(4)
Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, 40447, Taiwan

Reference

  1. Luo M, Zhang JC, Yin H, Wang CM, Morris-Natschke S, Lee K-H (2019) One-step templated synthesis of chiral organometallic salicyloxazoline complexes. BMC Chem. 13:51. https://doi.org/10.1186/s13065-019-0565-z View ArticleGoogle Scholar

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