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(17) In contrast, selective monoꢀiodination of 5j with NIS was not realiꢀ
zed using Pd(II) or Rh(III)ꢀcatalysis, which leads to diꢀiodination of this
substrate. See ref. 16d and 16h.
(18) Kim, J.; Chang, S. Angew. Chem., Int. Ed. 2014, 53, 2203.
(19) Only one example of 10% yield was reported in a mechanistic study,
see ref. 4u.
(20) These amides showed low to moderate conversions in the aboveꢀ
mentioned cyanation. On the other hand, the heterocyclic compounds,
which showed good reactivity in the cyanation reactions (Scheme 1), were
not further investigated due to uncatalyzed background reactions.
(5) (a) Chen, Q.; Ilies, L.; Nakamura, E. J. Am. Chem. Soc. 2011, 133,
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(
(
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1
radical substitution, see: (h) Liu, W.; Cao, H.; Xin, J.; Jin, L.; Lei, A.
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0.1055/sꢀ0034ꢀ1379247. For related cobaltꢀcatalyzed C–H arylation via
(21)
[Cp*Co(MeCN)
Using
the
preformed
cationic
Co(III)ꢀcomplex
, similar
3
(SbF ] instead of [Cp*Co(CO)I
6
)
2
2
] and AgSbF
6
reactivity is observed in the halogenation reactions, e.g. 50% isolated yield
for the substrate 1k, supporting the intermediacy of I.
(
6) (a) Yoshino, T.; Ikemoto, H.; Matsunaga, S.; Kanai, M. Angew.
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(
2010, 16, 11212. (b) Colby, D. A.; Tsai, A. S.; Bergman, R. G.; Ellman, J.
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(24) Further work on allylation of other substrates is underway and will
be reported in due course.
2
(
010, 49, 9262.
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