Thiacalixarenes

Thiacalix[4]arenes with Triple Bonds at the Lower Rim: Synthesis and Structure

“…[2,15] Accordingly, several groups have investigated [15,[16][17][18] the functionalization of (thia)calixarenes 1-4 by alkyl halides using the acetone(acetonitrile)/M 2 CO 3 reaction system (M ≡ Na, K, and Cs). As a part of our research into the derivatization of lower rim of these macrocycles, [3,[19][20][21][22][23][24][25][26][27][28][29][30][31] a systematic study of the reaction of thiacalix [4]arene 3 and p-tert-butylthiacalix [4]arene 4 with propargyl bromide in the presence of alkali metal carbonates (Scheme 1) was carried out.…”

“…[2,3] From this point of view the modular approach of click chemistry seems to be a perspective to design more sophisticated receptor and nanosized structures. Moreover, there is no need to protect the large number of functional groups during transformation.…”

Synthesis of p-tert-butylthiacalix[4]arenes functionalized with tris(2-aminoethyl)amine fragments at the lower rim and their interaction with model lipid membranes

“…[17][18][19][20][21][22][23][24][25] Thiacalix [4] arenes, analogues of classical calixarenes, are unique in that the initial macrocycles are easily obtained by a onestep synthesis, [18,25] their sulfide bridge fragments easily coordinates transition metal cations, [16] whiles the upper and lower rims are easily functionalized. [18,25] In addition, they exist in variable conformations [19][20][21] hence they offer different spatial arrangement of functional groups, a prerequisite for molecular recognition. Previously, it was shown that p-tert-butylthiacalix [4]arenes functionalized by N-propyl morpholine, N,N-dipropyliden-amine and aminodiacetate fragments interacted with the polar domains of model lipid membranes.…”

Selective Extraction of Precious Metal from Automotive Catalyst Residue by Thiacalix[6]arene Derivatives

“…Considerable attention has been recently focused on TCnAs because there are many features that are not presented in chemistry of CnAs [3] TCnAs are composed benzene rings, linked via sulfur bridges instead of methylene units, which itself can make host-guest complexation with metal cations because sulfide functional groups has affinity for metal cations [4]. In a previous paper, we first reported a metal sensor system based on water soluble di-, tri-dansyl modified thiacalix [4] arene [5].…”