Journal of the American Chemical Society
ARTICLE
removed in vacuo. The residue was purified by column chromatography
(CH2Cl2, Rf = 0.3) to yield 46 mg (42%) of the product as a yellow solid
after removal of the solvent. 1H NMR (400 MHz, CDCl3) δ 11.50 (s,
2H), 9.99 (s, 2H), 7.61 (d, J = 2.0 Hz, 2H), 7.57 (d, J = 2.0 Hz, 2H), 7.51
(s, 4H), 3.16 (q, J = 7.2 Hz, 2H), 1.65 (dq, J = 13.6, 7.6 Hz, 4H), 1.24 (d,
J = 6.8 Hz, 6H), 0.88 (t, J = 6.8 Hz, 6H). 13C NMR (100 MHz, CDCl3) δ
196.6 (2C); 159.9 (2C); 137.5 (2C); 137.1 (2C); 134.9 (2C); 131.7
(4C); 123.1 (2C); 120.3 (2C); 114.6 (2C); 90.4 (2C); 88.4 (2C); 33.2
(2C); 29.6 (2C); 20.3 (2C); 12.3 (2C). MS (MALDI TOF) m/z: MH
calcd for C32H30O4 478.2; found 478.1.
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’ ASSOCIATED CONTENT
S
Supporting Information. Descriptions and UHV-STM
b
images of minority absorption structures, general methods,
synthesis of (S)-4, H and 13C NMR spectra. This material is
1
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’ AUTHOR INFORMATION
Corresponding Author
*E-mail addresses: trolle@inano.au.dk, kvg@chem.au.dk.
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’ ACKNOWLEDGMENT
We acknowledge financial support from the Marie-Curie EST
MONET and ITN SMALL, The Danish Council for Indepen-
dent Research | Natural Sciences, The Villum Foundation, and
the Danish National Research Foundation for support to CDNA
and the Sino-Danish Center for Molecular Nanostructures on
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