BIPHENYLIC BISPHOSPHINES THROUGH ORTHO-METALATION OF ARYLDIPHENYLPHOSPHINE OXIDES

Authors
DESPONDS O
Citation
O. Desponds, BIPHENYLIC BISPHOSPHINES THROUGH ORTHO-METALATION OF ARYLDIPHENYLPHOSPHINE OXIDES, Chimia, 50(12), 1996, pp. 639-639
Citations number
9
Categorie Soggetti
Chemistry
Journal title
Chimia → ACNP
ISSN journal
00094293
Volume
50
Issue
12
Year of publication
1996
Pages
639 - 639
Database
ISI
SICI code
0009-4293(1996)50:12<639:BBTOOA>2.0.ZU;2-9
Abstract
Diphenyl-(2-trifluoromethyl)phosphine oxide was metalated next to the diphenylphosphinoyl group with LITMP. Upon iodination and Ullmann coup ling, the corresponding 3,3'-disubstituted bis(phosphine oxide) was ob tained. When phenyl-lithium was used as metalating agent, aryl/phenyl group exchange occurred. The torsional barrier for the planarization o f the biaryl moiety was equal to 22+/-1 kcal/mol.