Synthesis of new phenylazocalix[n]arenes (n = 4, 5)

Tetrahedron Letters

Volumn 41, Issue 15, 2000, Pages 2563-2567

  Bouoit Montésinos, Stéphanie ^a   Bassus, Jacques ^a   Perrin, Monique ^a   Lamartine, Roger ^a  

^a UNIVERSITÉ LYON 1   (France)

Author keywords

Azo compounds; Calixarenes; Cone conformation

Indexed keywords

AZO COMPOUND; CALIXARENE;

ARTICLE; CARBON NUCLEAR MAGNETIC RESONANCE; CHEMICAL REACTION; CHEMICAL STRUCTURE; PROTON NUCLEAR MAGNETIC RESONANCE; SYNTHESIS; X RAY CRYSTALLOGRAPHY;

EID: 0041700330     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(00)00259-8     Document Type: Article

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22. 3. Some attempts were made to resolve the disorder but the results were not good probably because the two ring positions are very near; the two positions result by a rotation around a···b. The conformation shows the anti-position of the two macrocycles. The calixarene molecules are in cone conformation. The OH bonds lengths and the inclination of the phenolic rings versus plane of oxygen atoms have usual values (2.59-2.74 Å and 118.2-127.1°). The angle between the two benzene ring planes A and B is 185°. The length of the molecule is approximatively 27 Å. The double calixarene crystallizes with a dichloromethane molecule; this one is inside one of the macrocycle and gives some interactions with two benzene rings. Fig. 2 shows the conformation of such a double calix[4]arene.