Cholic acid inclusion compounds

Guest exchange processes in cholic acid inclusion compounds... 

In contrast, the fluorescence spectra of the parent y-cyclodextrins (compounds y-CD1, y-CD2, y-CD3, y-CD4) exhibit both monomer and excimer bands in the absence of guests because the cavity is large enough to accommodate both fluorophores (Figure 10.38). The ratio of excimer and monomer bands changes upon guest inclusion. The ratio of the intensities of the monomer and excimer bands was used for detecting various cyclic alcohols and steroids (cyclohexanol, cyclo-dodecanol, i-borneol, 1-adamantanecarboxylic acid, cholic acid, deoxycholic acid and parent molecules, etc.). 

Among other hosts108 for inclusion and/or clathrate compounds are deoxycholic acid,101 cholic acid,102 small ring compounds such as 29,103 perhydrotriphenylene,104 and the compound 30, which has been called a carcerand.105... 

Deoxycholic acid (DCA), apocholic acid (ACA), and cholic acid (CA) form channel-type inclusion compounds with a wide variety of organic molecules. Of these DCA has been extensively investigated. 

K. Miki, A. Masui, N. Kasai, M. Miyata, M. Shibakami, K. Takemoto, New Channel-Type Inclusion Compound of Steroidal Bile Acid Structure of a 1 1 Complex between Cholic Acid and Acetophenone , J. Am. Chem. Soc., 110, 6594 (1988)... 

Miki, K., Masui, A., Kasai, N., Miyata, M., Shibakami, M., and Takemoto, K., New channel-type inclusion compound of steroidal bile acid. Structure of a 1 1 complex between cholic acid and acetophenone, J.Am. Chem. Soc. 110, 6594-6596 (1988). 

There are of course more organic compounds which can be used as host molecules in the formation of inclusion complexes. For most of them, e.g. urea and thiourea, crown ethers, cholic acid, hydroquinone, tri-o-thymotides and Di-anin s compound, the literature describing SS NMR applications in structural... 

Keywords cholic acid, p-toluidine, inclusion compound... 

Dried, sieved cholic acid (CA, particle size = 212-250 mm) and finely ground p-toluidine (recrystallized) were combined in a 1 10 molar ratio in a round-bottomed flask and shaken continuously to ensure constant mixing of the components. Samples were periodically removed from the reaction vessel and immediately washed with copious amounts of diethyl ether to remove all unreacted p-toluidine, (neither CA nor the CA- p-toluidine inclusion compound is soluble in ether). 

Porous host substructures with parallel channels are typical of many inclusion compounds formed by bile acids and their derivatives (see Deoxycholic, Cholic, and Apocholic Acids). In this class of compounds, host molecules are always optically active, and the resulting host networks are chiral. The best known among them are inclusion compounds of deoxycholic acid (DCA) (also known as choleic acidsj. With most guests. DCA molecules assemble via hydrogen bonds into a coiTugated... 

Channel Inclusion Compounds, p. 223 Clathrate Hydrates, p. 274 Deoxycholic, Cholic, and Apocholic Acids, p. 441 Gossypol, p. 606... 

A chiral host could readily be available from a naturally occurring compound. The use of steroidal acid, deoxycholic acid (Fig. 3d), yielded coinprehensive polymers, particularly, optically active polymers from pro-chiral monomers. Many derivatives of deoxy cholic acid have the corresponding characteristic inclusion abilities. For example, use of apocholic acid (Fig. 3e), cholic acid (Fig. 3f), and chenodeoxycholic acid (Fig. 3g) enabled us to perform one-dimensional inclusion polymerization of various diene and vinyl monomers. 

Caira, M.R. Nassimbeni, L.R. Scott. J.L. Inclusion compounds of cholic acid with aliphatic esters. J. Chem. Soc.. Perkin Trans. 2 1994, (3), 623-628. 

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