Syntheses of Calix[4]Pyrroles by Amberlyst-15 Catalyzed Cyclocondensations of Pyrrole with Selected Ketones
作者:Shive Chauhan、Bhaskar Garg、Tanuja Bisht
DOI:10.3390/12112458
日期:——
A facile and efficient protocol is reported for the synthesis of calix[4]pyrrolesand N-confused calix[4]pyrroles in moderate to excellent yields by reaction of dialkyl orcycloalkyl ketones with pyrrole catalyzed by reusable AmberlystTM-15 under eco-friendlyconditions.
A Se···O bonding catalysis approach to the synthesis of calix[4]pyrroles
作者:Qingzhe Tong、Zhiguo Zhao、Yao Wang
DOI:10.3762/bjoc.18.36
日期:——
chalcogen bonding catalysis approach to the synthesis of calix[4]pyrrole derivatives. The Se···O bonding interactions between selenide catalysts and ketones gave rise to the catalytic activity in the condensation reactions between pyrrole and ketones, leading to the generation of calix[4]pyrrole derivatives in moderate to high yields. This chalcogen bonding catalysis approach was efficient since only
Efficient ZnCl2 assisted synthesis of calix[4]pyrroles catalysed by Brønsted acidic ionic liquids
作者:Amit Kumar Rawat、S.M.S. Chauhan
DOI:10.1016/j.tetlet.2014.10.020
日期:2014.12
——
作者:M. Radha Kishan、N. Srinivas、K. V. Raghavan、S. J. Kulkarni、J. A. R. P. Sarma、M. Vairamani
DOI:10.1039/b105690p
日期:2001.10.23
Porosity and acidity of molecular sieve Al-MCM-41 (ca. 30 Angstrom 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 Angstrom pore diameter) yields mainly the linear chain dimer and no cyclic products.