B. Witulski et al., N-(9-ANTHRYL) AZA-18-CROWN-6 - PALLADIUM-CATALYZED SYNTHESIS, PHOTOPHYSICAL PROPERTIES AND CATION-BINDING ABILITY, Tetrahedron letters, 39(27), 1998, pp. 4807-4808
N-(9-Anthryl) aza-18-crown-6 (3) was synthesised via the palladium-cat
alysed cross-coupling of 9-bromoanthracene (1) and aza-18-crown-6 (2).
Its photophysical properties include an intramolecular charge-transfe
r absorption band (lambda(max)approximate to 425 nm) in polar and nonp
olar solvents, which disappears upon protonation or binding of K+ (log
K-ass = 3.7 in acetonitrile). (C) 1998 Elsevier Science Ltd. All righ
ts reserved.