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4.1 | Synthesis of Mn-NN complex
Under a nitrogen atmosphere, a mixture of Mn(CO)5Br
(275 mg, 1.0 mmol) and ligand L1 (195 mg, 1.0 mmol)
in CH3OH (25 ml) was stirred at 25ꢀC for 24 hr. All
the volatiles were removed under reduced pressure,
and the resultant residue was subject to purification by
recrystallization in CHCl2/CH3OH/n-hexane (1/0.1/3,
v/v/v) at 25ꢀC, affording complex A as an orange solid
(352 mg, 85%). Single crystals suitable for X-ray crys-
tallographic determination were grown from recrystalli-
zation in CHCl2/CH3OH/n-hexane (1/0.1/3, v/v/v) at
25ꢀC.
4.2 | General procedure for the synthesis
of quinolines (pyridines)
Under
1-phenylethanol
a
nitrogen atmosphere
(1a) (122 mg,
a
mixture of
1.0 mmol),
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(2-aminophenyl)methanol (2a) (123 mg, 1.0 mmol),
complex A (12.4 mg, 0.03 mmol), and tBuOK (56 mg,
0.5 mmol) in 2 ml of toluene was stirred at 110ꢀC for
12 hr. After cooling to ambient temperature, the reac-
tion was quenched with 10 ml of water and extracted
with EtOAc (3 × 10 ml). The combined organic phase
was concentrated under reduced pressure. The resultant
residue was subject to purification by column chroma-
tography on silica gel (eluent: petroleum ether
[60–90ꢀC]/ethyl acetate [100:1, v/v]) to afford 3a as a
white solid (168 mg, 82%). About the analytical data
and copies of NMR spectra of the compounds, please
see the supporting information Data S4, S5 for details.
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ACKNOWLEDGMENTS
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Catal. 2018, 8, 8525.
We are grateful to the National Natural Science Founda-
tion of China (21801158) and the Open Project Fund of
Qingdao University of Technology (QUTSEME201934)
for support of this research.
CONFLICT OF INTEREST
The authors declare that they have no conflict of interest.
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Int Ed 2015, 54, 14483.
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ORCID
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J. Am. Chem. Soc. 2016, 138, 15543.
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