Helvetica Chimica Acta p. 897 - 930 (1988)
Update date:2022-07-30
Topics:
Schmid, Rudolf
Cereghetti, Marco
Heiser, Bernd
Schoenholzer, Peter
Hansen, Hans-Juergen
The axially dissymmetric diphosphines (-)-(R)- and (+)-(S)-(6,6'-dimethylbiphenyl-2,2'-diyl)bis(diphenylphosphine)((-)-(R)-10 and (+)-(S)-10; 'BIPHEMP') have been synthesized, starting from (R)- and (S)-6,6'-dimethylbiphenyl-2,2'-diamine ((R)- and (S)-16), respectively, via Sandmeyer reaction, lithiation, and phosphinylation.Moreover, racemic 4,4'-dimethyl- and 4,4'-bis(dimethylamino)-substituted analogues 11 and 12, respsctively, and the 6,6'-bridged analogue 1,11-bis(diphenylphosphino)-5,7-dihydrodibenz
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