21161-08-0Relevant academic research and scientific papers
A convenient synthesis of new macrocyclic thioether-esters and ether-esters: Extraction properties of these esters for alkali, alkaline earth, and transition metal cations
Seyedi, Seyed Mohammad,Shadkam,Ziafati
, p. 1953 - 1960 (2007/10/03)
Macrocyclic thioether-esters and ether-esters have been prepared by treating 2,2′-dithiobenzoic acid dichloride and 1,2-benzendicarboxylic acid dichloride with appropriate glycols or dithiol. The complexing ability of these thioether-esters and ether-esters toward Li+, Na+, K+, Mg2+, Ca2+, Sr2+, Ba 2+, Co2+, and Ni2+ has been measured by the solvent extraction method. The extraction data indicate that compound 2 exhibits stronger selectivity toward Li+, 3 toward Ba2+, 4 toward K+, 5 toward Mg2+, 6 toward Ba2+ and Sr 2+, and 7 toward Co2+ and Ni2+ when compared with other cations. Copyright Taylor & Francis Inc.
Synthesis of macrocyclic polyether-diester compounds using Al2O3/MeSO3H (AMA) as a new reagent
Sharghi, Hashem,Sarvari, Mona Hosseini
, p. 879 - 882 (2007/10/03)
A new simple and convenient method for the synthesis of macrocyclic polyether-diester compounds containing pyridine and phenyl subcyclic units is developed. Various diacids, are selectively esterified in excellent yields by reaction with oligoethylene glycols in the presence of Al2O3/MeSO3H (AMA) as a new reagent without use of any solvents.
Tris(2-methoxyphenyl)bismuthane as a Dehydrating Agent with High Template Ability: an Efficient Single-step Synthesis of Macrocyclic Diesters from Diacid Anhydrides and Glycols
Ogawa, Takuji,Yoshikawa, Akemi,Wada, Hidemi,Ogawa, Chie,Ono, Noboru,Suzuki, Hitomi
, p. 1407 - 1408 (2007/10/02)
Tris(2-methoxyphenyl)bismuthane works as both a mild dehydrating agent and a good template for macrocyclic ester synthesis; prolonged heating of the bismuthane with a dicarboxylic acid anhydride and a glycol in toluene under reflux afforded the corresponding macrocyclic 1:1 diester in moderate to good yields, together with a small amount of a macrocyclic 2:2 tetraester.
