. 2020 Jun 23;5(26):16010–16020. doi: 10.1021/acsomega.0c01413

Table 2. Quaternization of MePPh₂ and BnPPh₂ with Aryl Bromides^a.

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Quaternization conditions: Ph₂PCH₂R, ArBr (1 equiv), NiBr₂ (6 mol %), phenol, reflux, 5 h.

Refluxed for 15 min.

In the absence of NiBr₂, 3d was isolated in 86% yield after 20 h.

Without NiBr₂, 16 h.

Without NiBr₂, 8 h.

Table 2. Quaternization of MePPh2 and BnPPh2 with Aryl Bromidesa.