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2004
Organo-boron compounds
S 0040
10-Hydroxy-10,9-boroxarophenanthrenes: Versatile Synthetic Intermediates to
and Triaryls. — Treatment of the 2-methoxybiaryls (I) with
47- 146 3,4-Benzocoumarins
BBr3 as well as reaction of 2-hydroxybiaryls with BCl3/AlCl3 results in unexpected formation of 10,9-boroxarophenanthrenes. The latter can smoothly be converted into
2,2'-dihydroxybiaryls, 3,4-benzocoumarins, and triaryls. Staring from 2-aminobiphenyls formation of 10,9-borazarophenanthrenes is possible. — (ZHOU*, Q. J.; WORM,
K.; DOLLE, R. E.; J. Org. Chem. 69 (2004) 15, 5147-5149; Dep. Chem., Adolor
Corp., Exton, PA 19341, USA; Eng.) — Jannicke
2004
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