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. Author manuscript; available in PMC: 2013 Nov 2.
Published in final edited form as: J Org Chem. 2012 Oct 22;77(21):9496–9503. doi: 10.1021/jo301531k

TABLE 5.

Homocoupling of Arylboronic Acidsa

graphic file with name nihms-416920-f0006.jpg
entry Pd(OAc)2 Cu(OAc)2 CuCl2 6 (%)
1 10 mol% 2 equiv 2 equiv 70
2 10 mol% 2 equiv none 82
3 10 mol% none 2 equiv 9
4 none 2 equiv 2 equiv 14
5 none 2 equiv none 25
6 none none 2 equiv 6
a

Reaction conditions: 2a (0.4 M) in DMF under N2 at 60 °C for 1 h.