Detail of "2279-15-4"

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Thermodynamic properties of enantioseparation of two N-carbobenzyloxy-D,L-amino acids on cellulose tris(4-methylbenzoate) chiral stationary phase

Thermodynamic properties of enantioseparation of two N-carbobenzyloxy-D,L-amino acids on cellulose tris(4-methylbenzoate) chiral stationary phase. Kazusaki, Masato; Shoda, Toshiya; Kawabata, Hirofumi; Yamaguchi, Toshikazu (Department of Chemical Analysis, Pharmaceutical Research Laboratories, Dainippon Pharmaceutical Co., Ltd., Osaka 553-0001, Japan). Chromatography, 24(2), 63-67 (English) 2003 Society for Chromatographic Sciences. CODEN: CHROFZ. ISSN: 1342-8284. DOCUMENT TYPE: Journal CA Section: 80 (Organic Analytical Chemistry) The isocratic retention of enantiomers of N-carbobenzyloxy-D,L-tryptophan and N-carbobenzyloxy-D,L-phenylalanine was studied on cellulose tris (4-methylbenzoate) coated on silica as a chiral stationary phase at different temps. and with different mobile phase compns. in the reversed-phase mode. The thermodn. parameters were calcd. to promote an understanding of the relation between enthalpy and entropy for enantiosepn. in this chromatog. system. The sepn. was enthalpy-controlled with neg. 1161-13-3 and 2279-15-4 which are cas registry numbers of substances are two of reagents here. entropic contribution in the HPLC condition studied. The enthalpy-entropy relation indicates that enthalpic gain/loss for enantiosepn. from any change of org. modifier content in the mobile phase is almost cancelled out by the entropic loss/gain. .

Molecularly imprinted beaded polymers and stabilized suspension polymerization of the same in perfluorocarbon liquids

Molecularly imprinted beaded polymers and stabilized suspension polymerization of the same in perfluorocarbon liquids. Mosbach, Klaus; Mayes, Andrew G. (Igen, Inc.; Mosbach, Klaus; Mayes, Andrew, G., USA). PCT Int. Appl. WO 9637527 A1 28 Nov 1996, 37 pp. DESIGNATED STATES: W: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI; RW: AT, BE, BF, BJ, CF, CG, CH, CI, CM, DE, DK, ES, FI, FR, GA, GB, GR, IE, IT, LU, MC, ML, NL, PT, SE. (English). (World Intellectual Property Organization). CODEN: PIXXD2. CLASS: ICM: C08F220-38. ICS: C08F220-28; C07B057-00. APPLICATION: WO 1996-US6972 24 May 1996. PRIORITY: US 1995-451711 26 May 1995. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 34, 35, 80 A suspension polymn. technique for mol. 2279-15-4 and 740-57-8 which are cas registry numbers are also used here. imprinting is based on the use of a perfluorocarbon liq. as the dispersing agent which does not interfere with the interactions between functional monomers and print mols. required for the recognition process during mol. imprinting and produces polymer beads having controllable particle size of 5-100 mm. The polymn. process comprises (1) forming a reaction mixt. contg. a mixt. of distinct acrylic monomers, a crosslinking agent, an initiator, a mol. imprint mol., and a porogenic solvent and (2) polymg. the monomers in the presence of an emulsion stabilizer contg. perfluorocarbon and polyoxyethylene ester groups. The polymer beads can be used as support in sepg. or resolving amino acids, amino acid derivs., pharmaceuticals, and polysaccharides using methods such as HPLC. .