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2005
Other naphthalene derivatives
Q 1020
Reductive Opening of 2,7-Dihydrodinaphthoxepin and Thiepin: Easy RegioselecPreparation of 2,2'-Difunctionalized Binaphthyls. — Reductive cleavage of
10- 095 tive
substrates (I) with lithium naphthalenide gives dicationic intermediates. Quenching
with electrophiles yields unsymmetrically substituted binaphthyl (III) and (IV). Under
conditions B), symmetrically substituted binaphthyl (V) and (VI) are obtained. The
products are of interest as ligands in asymmetric syntheses. — (FOUBELO*, F.;
MORENO, B.; YUS, M.; Tetrahedron Lett. 45 (2004) 49, 8983-8986; Dep. Quim.
Org., Fac. Cienc., Univ. Alicante, E-03080 Alicante, Spain; Eng.) — Mais
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