| 摘要 |
NEW MATERIAL:p-Nitro-calix[n]arene expressed by the formula (n is an integer 4-8 which is the number of aromatic rings constituting the skeleton; M is H or sodium ion). EXAMPLE:p-Nitro-calix-6-arene. USE:Effective as an intermediate for synthesizing calixarenes having the catalytic ability similar to that of enzymes. PREPARATION:A calix[n]arene is charged into and suspended in concd. sulfuric acid in >=90%, preferably >=95% concentration and heated at >=80 deg.C, preferably >=90% deg.C. The resultant reaction misture is, without taking out the calix[n]arene- p-sulfonic acid formed by the reaction, diluted with water to give 30-70% concentration of the reactant sulfuric acid. Nitric acid or a nitrate, e.g. sidum or potassium nitrate, is then added thereto while cooling to substitute the sulfone group by nitro group and give the aimed compound expressed by formula I.
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