Three cleft type hydrogen bonding receptors were prepared, with slightly different geometries due to the presence of either methylene, oxygen, or sulfur. All three are able to complex urea, one with the methylene group being the best suited. Benzyl formamide, probably due to its smaller cleft, is better associated to the oxygen compound.
Diamino-9,10-dihydroanthracene und davon abgeleitete Polyamidsäure-(ester) und Polyimide
申请人:CIBA-GEIGY AG
公开号:EP0253765B1
公开(公告)日:1990-04-18
US4847359A
申请人:——
公开号:US4847359A
公开(公告)日:1989-07-11
Three complexing agents for ureas and formamides
作者:Mercedes Crego、J.José Marugán、César Raposo、Ma José Sanz、Victoria Alcázar、Ma Cruz Caballero、Joaquín R. Morán
DOI:10.1016/s0040-4039(00)79900-x
日期:1991.8
Three cleft type hydrogen bonding receptors were prepared, with slightly different geometries due to the presence of either methylene, oxygen, or sulfur. All three are able to complex urea, one with the methylene group being the best suited. Benzyl formamide, probably due to its smaller cleft, is better associated to the oxygen compound.
Anthracene Bisureas as Powerful and Accessible Anion Carriers
作者:Christopher M. Dias、Hennie Valkenier、Anthony P. Davis
DOI:10.1002/chem.201800508
日期:2018.4.20
for chloride/nitrate exchange in vesicles, but poor accessibility and deliverability. This work shows that anthracene 1,8-bisureas can fulfil all three criteria. In particular, a bis-nitrophenyl derivative is prepared in two steps from commercial starting materials, yet shows comparable transport activity to the best currently known. Moreover, unlike earlier highly active systems, it does not need to