332096-95-4Relevant academic research and scientific papers
1,2-Phenylene-Incorporated Smallest Expanded Calix[4]pyrrole via One-Step Synthesis of Tetrapyrrane: A Fluorescent Host for Fluoride Ion
Kumar, B. Sathish,Chandra, Brijesh,Jovan Jose,Panda, Pradeepta K.
, p. 10536 - 10543 (2021)
Synthesis of tetrapyrrane 8 from acetone and pyrrole via one-step condensation was achieved for the first time along with a much-improved yield of the tripyrrane 9. Diborylation of the tetrapyrrane and subsequent 1 + 1 cyclocoupling with 1,2-diiodobenzene following the Suzuki protocol generated novel o-phenylene incorporated macrocycle belonging to the smallest meso-expanded calix[4]pyrrole family. The latter macrocycle displays exclusive turn-on fluorescence sensing of fluoride ion upon complexation via a unique partial cone conformation supported by DFT analysis in acetonitrile solvent.
A novel, shape-selective, zeolite-catalyzed synthesis of calix(4)pyrroles
Kishan, M. Radha,Srinivas, N.,Raghavan, K. V.,Kulkarni, S. J.,Sarma, J. A. R. P.,Vairamani, M.
, p. 2226 - 2227 (2007/10/03)
Porosity and acidity of molecular sieve Al-MCM-41 (ca. 30 Angstroem pore diameter) plays a crucial role in the synthesis of novel calix(4)pyrroles; for the first time, Al-MCM-41 has been used as a solid acid catalyst to produce a number of calix(4)pyrroles with good selectivity and yields where zeolite HY (ca. 7.6 Angstroem pore diameter) yields mainly the linear chain dimer and no cyclic products.
