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. 2024 Apr 24;9(18):19982–19991. doi: 10.1021/acsomega.3c10008

Table 1. Optimization of the Reaction Conditions.

graphic file with name ao3c10008_0006.jpg

entry TM catalyst oxidant (2 equiv) remarks
1 [RuCl2(p-cymene)]2 air no reaction
2 [RuCl2(p-cymene)]2 K2S2O8 no reaction
3 [RuCl2(p-cymene)]2 Cu(OAc)2 no reaction
4 [RuCl2(p-cymene)]2 PhI(OAc)2 no reaction
5 [RuCl2(p-cymene)]2 MesI(OAc)2 no reaction
6 [RuCl2(p-cymene)]2 PhI(TFA)2 60%a
7 [RuCl2(p-cymene)]2 PhI(TFA)2 46%a under air
8b [RuCl2(p-cymene)]2 PhI(TFA)2 90%a
9c [RuCl2(p-cymene)]2 PhI(TFA)2 complex mixture
10 RuCl3·H2O PhI(TFA)2 no reaction
11 Pd(OAc)2 PhI(TFA)2 no reaction
a

Product by HPLC.

b

3 equiv of the oxidant used.

c

[Ir(dF(CF3)ppy)2(dtbbpy)]PF6 (5 mol %) used instead of 4CzIPN.