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. Author manuscript; available in PMC: 2023 Jan 19.
Published in final edited form as: J Am Chem Soc. 2019 Sep 20;141(39):15483–15487. doi: 10.1021/jacs.9b08464

Table 1.

Ligand Effect on Para CHB of 1a′

graphic file with name nihms-1864641-t0003.jpg
entry ligand (R =) solvent T (°C) conva p/ma
 1 t-Bu (L1) THF    80  100  6:1
 2 CN (L2) THF    80  0  ND
 3 H (L3) THF    80  89  7:1
 4 Me (L4) THF    80  96  10:1
 5 OMe (L5) THF    80  100  13:1
 6 tmphen (L6) THF    80  100  6:1
 7 phen (L7) THF    80  45  9:1
 8 NMe2 (L8) dioxane    80  100  12:1
 9 OMe (L5) dioxane    80  100  14:1
 10 OMe (L5) dioxane    60  100  16:1
 11 OMe (L5) dioxane    40  100  17:1
 12b OMe (L5) dioxane    rt  83  21:1
a

Determined by 1H NMR analysis.

b

Reaction carried out for 50 h