A New Synthesis of Oxacalix[3]arene Macrocycles and Alkali-Metal-Binding Studies
摘要:
The title oxacalix[3]arene macrocycles 1 have been synthesized in yields of 12-32% by an acid-catalyzed, high-dilution condensation of 2,6-bis(hydroxymethyl)-p-subtituted-phenols, where R = t-Bu, i-Pr, Et, Me, and Cl. The macrocycles are isolated in high purity without chromatography, as the sodium or potassium,salts of their monoanions. Metal-binding studies indicate that, Like the related calixarenes, the oxacalix[3]arenes bind alkali metals only in the presence of base (Na(+)approximate to K+ > Li+).
New synthetic route to homooxacalix[n]arenes via reductive coupling of diformylphenols
作者:Naoki Komatsu
DOI:10.1016/s0040-4039(00)02336-4
日期:2001.2
homocoupling of 4-substituted-2,6-diformylphenols with Et3SiH in the presence of Me3SiOTf gave homooxacalix[n]arenes (1n·R, n=3, 4) in moderate yields. Heterocoupling reaction of 4-substituted-2,6-diformylphenols with tris(trimethylsilyl) ether of 4-substituted-2,6-bis(hydroxymethyl)phenols afforded homooxacalix[n]arenes (23·R1·R2·Rm and 24·R1·R2·R1·Rm, m=1, 2) with different substituents in a one-pot fashion
在Me 3 SiOTf存在下,4-取代的2,6-二甲酰基苯酚与Et 3 SiH的还原均偶联反应以中等收率得到了高恶唑烷[ n ]芳烃(1 n ·R,n = 3,4)。4-取代的2,6-二甲酰基苯酚与4-取代的2,6-双(羟甲基)苯酚的三(三甲基甲硅烷基)醚的异质偶联反应得到高氧杂芳基[ n ]芳烃(2 3 ·R 1 ·R 2 ·R m和2 4 ·R 1 ·R 2 ·R 1 ·R m,m= 1,2)以一锅的方式带有不同的取代基。
A New Synthesis of Oxacalix[3]arene Macrocycles and Alkali-Metal-Binding Studies
作者:Philip D. Hampton、Zsolt Bencze、Weidong Tong、Charles E. Daitch
DOI:10.1021/jo00096a026
日期:1994.8
The title oxacalix[3]arene macrocycles 1 have been synthesized in yields of 12-32% by an acid-catalyzed, high-dilution condensation of 2,6-bis(hydroxymethyl)-p-subtituted-phenols, where R = t-Bu, i-Pr, Et, Me, and Cl. The macrocycles are isolated in high purity without chromatography, as the sodium or potassium,salts of their monoanions. Metal-binding studies indicate that, Like the related calixarenes, the oxacalix[3]arenes bind alkali metals only in the presence of base (Na(+)approximate to K+ > Li+).
Uranyl ion complexation by medium and large homooxacalixarenes: from mono- to poly-uranate complexes
Crystal structures of dioxouranium(VI) complexes of three homooxacalix[n]arenes (n = 4, 6 or 8) have shown the possibility to complex metal moieties of variable nuclearity, depending upon the number of phenolic groups and ether links they contain. p-tert-Butyltetrahomodioxacalix[6]arene embraces a single uranyl unit through tetraphenoxide coordination as commonly observed in calixarene complexes, whereas