100460-07-9Relevant academic research and scientific papers
Benzocrown Derivatives as Ionophores for Alkali Cations, III.- Synthesis of Ring-Cleaved Analogues of Benzocrown Ethers.- A Novel Method for Building Up Crown Ether Rings
Toeke, Laszlo,Bitter, Istvan,Agai, Bela,Hell, Zoltan,Lindner, Ernoe,et. al.
, p. 761 - 764 (2007/10/02)
Several ring-cleaved analogues (9, 11a,b) of bis(benzo-15-crown-5)-urethanes (1a,b) were prepared to study the change of complexation by electroanalytical methods.The syntheses of the title compounds (9, 11a,b) were accomplished in two ways: starting from 4-nitroveratrole (2) via intermediates 3-8 to give compound 9 and by alkaline hydrolytic cleavage of 4-nitrobenzocrown ethers (10a,b), then by subsequent steps yielding 11a,b.
NUCLEOPHILIC RING CLEAVAGE OF CROWN ETHERS, NOVEL METHOD FOR BUILDING UP CROWN ETHER RINGS
Agai, Bela,Bitter, Istvan,Hell, Zoltan,Szoelloesy, Aron,Toeke, Laszlo
, p. 2705 - 2708 (2007/10/02)
The crown ether rings in 4-nitrobenzo-15-crown-5 and -18-crown-6 are cleaved by aqueous alkali affording long chain substituted pyrocatechols which proved to be good starting material for constructing crown ether rings other than the original one.
