992-52-9Relevant academic research and scientific papers
Synthesis of Monofunctionalized Calix[5]arenes
Ingenfeld, Bj?rn,Straub, Steffen,Fr?mbgen, Christopher,Lützen, Arne
, p. 676 - 684 (2017/11/16)
Seven OH-free and O -permethylated monofunctionalized calix[5]arenes carrying either additional methyl or tert -butyl groups are prepared following fragment condensation protocols. This strategy proves to be superior to previous approaches. Calix[5]arenes with free OH groups all adopt a cone conformation stabilized by a seam of hydrogen bonds at the lower rim. Post-condensation modifications, i.e., methylation of phenolic OH groups or functional group interconversions can also be achieved. Bulky tert -butyl groups are also found to stabilize the cone conformations of O -methylated compounds. These compounds offer versatile functional groups that make these concave molecules interesting building blocks for the synthesis of more sophisticated molecular architectures.
Inclusion Properties of Acyclic p-Substituted Phenol-Formaldehyde Oligomers
Sone, Tyo,Ohba, Yoshihiro,Yamazaki, Hajime
, p. 1111 - 1116 (2007/10/02)
Acyclic para-substituted phenol-formaldehyde oligomers (R=H, Me, n-Nu, t-Bu, and cyclohexyl; the number of phenol units=3-6) form host-guest complexes with various organic compounds.The inclusion property of the acyclic oligomers is greatly influenced by
