Tetrahedron p. 6073 - 6084 (1997)
Update date:2022-08-05
Topics:
Cossu, Sergio
De Lucchi, Ottorino
Fabbri, Davide
Valle, Giovanni
Painter, Gavin F.
Smith, Robin A.J.
The preparation of a number of biaryldithiols from biaryldiols is discussed. A key reaction is the Newman-Kwart thermorearrangement of bisthiocarbamates and crucial variables of temperature and reaction time have been identified. Alternative approaches to 3,3'-disubstituted dithiols via ortho metallation are presented. The benefit of using such disubstituted compounds is illustrated with representative examples of the stereochemical features of the derived carbanions in reactions with prochiral electrophiles.
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(1997)