2938
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2297.
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10. All reaction products and starting materials are commer-
cially available. The calibration curves to determine rela-
tive reponses by flame-ionization detection were
generated using commercial chemicals of at least 98%
purity. A reaction that indicated a GC yield of 79%
2,2%-bipyridine (16) afforded a purified yield of 73% after
column chromatography.
Scheme 7. Reagents and conditions: (a) 4, PdCl2(PPh3)2,
K3PO4, DMF, 100°C.
Acknowledgements
We thank the Petroleum Research Fund (35968-GB1),
Research Corporation (CC5241), and Davidson College
for financial support and Frontier Scientific Corpora-
tion for a donation of bis(pinacolato)diboron.
11. (a) Segelstein, B. E.; Butler, T. W.; Chenard, B. L. J. Org.
Chem. 1995, 60, 12–13; (b) Kong, K.-C.; Cheng, C.-H. J.
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