9-Anthracenecarboxylate

Figure 5.17 Temperature dependence of induced CD of 9-anthracenecarboxylate bound to chiral filaments of 2C12-L-GluCnN+ (22). Reprinted with permission from Ref. 83. Copyright 1994 by the American Chemical Society. 

More R, Busse G, Hallmann J, Paulmann C, Scholz M, Techert S (2010) Photodimerization of crystalline 9-anthracenecarboxylic acid a nontopotactic autocatalytic transformation. J Phys ChemC 114 4142 148... 

There are several reports wherein head-head dimers were not formed preferentially in micellar solutions. For example, the syn head-tail simers, 61, the same ones obtained in solution formed when a number of 7-al-koxycoumarins (60) (alkoxy group chain length was varied between methoxy to octadecyloxy) were irradiated in SDS and HDTC1 micelles [194,195], The same head-tail dimers, obtained in solution, were formed when 9-methyl-anthracene and 9-anthracenecarboxylic acid were irradiated in CTAB and... 

Figure 13. The photochemically induced dethreading (MeCN or H2O, 298 K) of pseudorotaxane [25 4] + based on the use of the external photosensitizer P (e.g., 9-anthracenecarboxylic acid) and the reductant scavenger Red (triethanolamine). Rethreading occurs upon oxygenation of the solution [35, 36].

Carboxylate-bridged Cr dimers are synthesized from chromocene. Benzoic acid, pivalic acid, and 9-anthracenecarboxylic acid react with (f/ -CsH5)2Cr to form Cr2(02CR)4 dimers. Chromium hexacarbonyl is oxidized to dimeric Cr(II) complexes by 2,4-dimethyl-6-hydroxypyrimidine and A, A -(3,5-xylyl) formamidine in refluxing... 

Figure 12.9 Photocleavage of supercoiled < )X7 74 plasmid DNA by cyclopropane derivatives. Lanes c, control I, ethyl 9-anthracenecarboxylate II, (S,S)-55 III, (S,S)-56/ IV, (R,R)-19 V, (S,S)-19 VI, (S,S)-S7. Reaction buffer 20mM sodium phosphate pH 7.0 (20% DMSO) Samples were irradiated at 25 °C for 45 min at a distance of 6 cm using a xenon lamp with a polystyrene filter (365 nm). Electrophoresis was run using 0.8% agarose gel with TAE buffer at 100 V for 40 min. Ehe gel was stained with EtBr and visualized by UV-B lamp (transilluminator).

To our knowledge, only one report exists in which the formation of carboxylic acid by radical carboxylation with carbon dioxide has been documented. Curran and co-workers observed the formation of 9-anthracenecarboxylic acid in 10% yield, together with 71% yield of anthracene, when the radical reduction of 9-io-doanthracene with the ethylene-spaced fluorous tin hydride was run using supercritical CO2 (90°C, 280 atm) as the reaction media (Scheme 4-41) [69], As demonstrated in this example, the CO2 trapping reaction by radicals is not an efficient process and therefore is of limited synthetic utility. The rate constant for the addition is yet to be determined, but kinetic studies to date indicate that generally the decarboxylation of acyloxyl radicals is a rapid process [70]. 

Photoinitiated SET has been used to drive a molecular machine and absorption and fluorescence spectroscopy have been used to monitor it. A 1 1 pseudoro-taxane forms spontaneously in solution as a consequence of the donor-acceptor interactions between the electron-rich naphthalene moiety of the thread (380) and the electron-deficient bipyridinium units of the cyclophane (381). The threading process is monitored by the appearance of a charge transfer absorption band and disappearance of the naphthalene fluorescence. Excited state SET from 9-anthracenecarboxylic acid (9-ACA) reduces a bipyridinium moiety of the cyclophane, lessening the extent of interaction between the thread and the cyclophane and dethreading occurs. On addition of oxygen the reduced cyclophane is reoxidised and threading reoccurs. ... 

Upon photosensitization with (- )-menthyl salicylate 48a (X = 2-OH), pyromel-litate 49a, 1- and 2-naphthalenecarboxates 41a and 42a, 2,3- and 2,6-naphthalene-dicarboxylates 43a and 91a, and/or 9-anthracenecarboxylate 73a in acetonitrile at 25 or -40°C, aryl vinyl ethers 87 (X = H or Cl) and 4-methoxystyrene 89 cyclodimerize to the corresponding cyclobutane derivatives 88 and 90 (only the trans isomers are chiral) in low to good yields (Scheme 15) [64]. However, the... 

Anthracenecarboxaldehyde 1-Anthracenecarboxylicacid 2-Anthracenecarboxylicacid 9-Anthracenecarboxylic acid 9,10-Anthracenedicarbonitrile 9,10-Anthracenediol... 

There are a variety of cationic surfactants other than quaternary alkylammonium salts. Accordingly, complex formation of 1-hexadecylpyridinium bromide (CPB) was attempted (Figure 4.44). After many trials, ten complex crystals were obtained, two of which were suitable for X-ray analysis, i.e. with guaiacol (XXXIII) and 9-anthracenecarboxylic acid (XXXTV) (Figure 4.44). The two crystals are isostructural. 

Figure 4.44 Structural formulae of hexadecylpyridinium bromide (CPB) and 9-anthracenecarboxylic acid...

---