Reference

Silica-immobilized formylsalicylic acid as a selective phase for the extraction of iron(III)

Silica-immobilized formylsalicylic acid as a selective phase for the extraction of iron(III). Mahmoud, Mohamed E.; Soliman, Ezzat M. (Fac. Sci., Alexandria Univ., Alexandria 21321, Egypt). Talanta, 44(1), 15-22 (English) 1997 Elsevier. CODEN: TLNTA2. ISSN: 0039-9140. DOCUMENT TYPE: Journal CA Section: 79 (Inorganic Analytical Chemistry) The immobilization of formylsalicylic acid compds. on the surface of amino group-contg. silica gel phases is described. The resulting phases were tested for the extn. of iron(III) and showed an exchange capacity of 0.95-0.96 mmol g-1. The other metal ions tested showed lower metal capacity values than iron (III). 616-76-2 and 610-04-8 are also in the experiment. The selectivity of the phases tested for the extn. of iron(III) from a mixt. contg. several other metal ions was evaluated using at. absorption spectrometry. A method for the recycling of immobilized silica gel after metal extn. is described for practical applications. .

(3-Pyridinyl)heteroalkarylalkanols, alkanoic acids and esters

(3-Pyridinyl)heteroalkarylalkanols, alkanoic acids and esters. Lin, Chiu Hong (Upjohn Co. , USA). Eur. Pat. Appl. EP 100158 A2 8 Feb 1984, 38 pp. DESIGNATED STATES: R: BE, CH, DE, FR, GB, IT, LI, NL, SE. (English).Several reagents with their cas registry numbers 89814-33-5 and 616-76-2 are used here. (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C07D213-74; C07D213-70; C07D213-65. APPLICATION: EP 83-303851 1 Jul 1983. PRIORITY: US 82-402514 28 Jul 1982. DOCUMENT TYPE: Patent CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Section cross-reference(s): 1 The title compds. I (X = O, S, NR2; X1 = O, S, NR2, bond; R = H, OH, OMe, OAc, F, Cl, Br, Me, CF3, NMe2, NO2; R1 = CO2R3, CH2OH, OH, SH, NHR2; R2 = H, alkyl, CHO; R3 = H, cation, alkyl, cycloalkyl, aralkyl, Ph, substituted Ph; m = 1-5; n = 0-5) were prepd. Thus, 4-HOC6H4CHO was treated with BrCH2CO2Me and the resulting 4-OCHC6H4OCH2CO2Me was treated with 3-aminopyridine to give the imine which was reduced to II (R1 = CO2Me, CH2OH). II (R1 = CO2Me) was sapond. to II (R1 = CO2Na) which had a ED50 for thromboxane A2 synthetase inhibition of <1000 ng/mL. .