- CALIXARENE COMPOUNDS AND USES THEREOF
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Compounds of general Formula (I) wherein the elements A, L, R1 and R2 have a defined meaning, and their medical and non-medical use.
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- Solvent-free synthesis of trisphenols as starting precursors for the synthesis of calix[4]arenes using sulfonated multi-walled carbon nanotubes
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The condensation of phenol derivatives (12 substrates) with 2,6-bis(hydroxymethyl)phenols (BMP) (6 examples) is reported using sulfonated multi-walled carbon nanotubes (SO3H@MWCNTs) under solvent-free conditions as starting precursors for the synthesis of macrocyclic molecules of calix[4]arenes. The new protocol provides a series of trisphenol derivatives (21 examples) in high yields (up to 94%) and relatively short reaction times (15-120 min). Also, direct synthesis of calix[4]arenes from different trisphenols by use of the catalyst was reported (5 examples). Furthermore, the synthesized calix[4]arene was obtained using a one-pot method from simple and easily available starting materials such as p-cresol for the synthesis of 5,11,17,23-tetramethylcalix[4]arene-25,26,27,28-tetraol. Also, in this process SO3H@MWCNTs can be reused for seven runs with almost consistent efficiency and can be recovered by easy filtration.
- Fareghi-Alamdari, Reza,Golestanzadeh, Mohsen,Zekri, Negar
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p. 3400 - 3412
(2016/05/09)
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- Ferrocenium salts mediate para-tert-butylcalixarene synthesis
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Ferrocenium salts mediate high yielding one-pot and convergent syntheses of para-tert-butylcalixarenes in mild non-Lewis or Bronsted acidic reaction conditions; EPR indicates complex formation between the s-trioxane and the ferrocenium salt. The Royal Soc
- Bew, Sean P.,Cheesman, Myles R.,Sharma, Sunil V.
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supporting information; experimental part
p. 5731 - 5733
(2009/04/13)
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- Synthesis of chiral calixarene-like salen ligand and application in catalytic asymmetric Friedel-Crafts reaction of aromatic amines with glyoxylate
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A new calixarene-like salen ligand is efficiently prepared from 2,6-bishydroxymethyl-4-tert-butyl phenol as starting material by a five-step synthesis. The enantioselective Friedel-Crafts reactions of aromatic amine with glyoxylate are examined employing
- Zhu, Chengjian,Yuan, Chaoying,Lv, Yang
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p. 1221 - 1224
(2007/10/03)
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