149790-91-0Relevant academic research and scientific papers
Syntheses of p-tert-butyloxocalix[4]-, [5]-, and [6]arenes and their behavior in solution
Ito, Kazuaki,Izawa, Soichiro,Ohba, Toshio,Ohba, Yoshihiro,Sone, Tyo
, p. 5959 - 5962 (2007/10/03)
p-tert-Butyloxocalix[4]-, [5]-, [6]arenes were synthesized by a stepwise procedure. NMR studies demonstrated that strong intramolecular hydrogen bonding between the bridging CO and neighboring phenolic OH groups in the oxocalixarenes weakened the circular
Synthesis and Inclusion Properties of Carbonyl-Bridged Analogs of Acyclic p-t-Butylphenol-Formaldehyde Oligomers
Ohba, Yoshihiro,Irie, Keisaku,Zhang, Fu Sheng,Sone, Tyo
, p. 828 - 835 (2007/10/02)
A series of compounds in which a part or all of the methylene bridges of acyclic p-t-butylphenol-formaldehyde oligomers are replaced by C=O bridge(s) has been synthesized.The carbonyl-bridged tetramers, except for that with no methylene bridge, formed crystalline host-guest complexes with various organic compounds; those with two C=O bridges were superior regarding complexation, regardless of the position of the bridges.Exclusive guest selectivity of the tetramer with one terminal C=O bridge was observed for benzene and its methyl derivatives in a two-component system.The fully carbonyl-bridged dimer, trimer, tetramer, and pentamer had no complexing-capability.The thermal stability of benzene complexes (host : guest = 2 : 1) of the tetramers with one C=O bridge, as estimated from their thermal dissociation rates, are remarkably lower than that of the parent tetramer.Oximes derived from the tetramers with one C=O bridge were much more effective than the corresponding carbonyl-bridged ones regarding their complex-forming capability.
