35303-46-9Relevant academic research and scientific papers
Effects of 5,5-substitution on dipyrrolylmethane ligand isomerization
Swartz II, Douglas L.,Odom, Aaron L.
, p. 4254 - 4258 (2008)
The difference in steric profiles for η5 and η1-pyrrolyls can be used to modify barriers for pyrrolyl exchange. The method investigated incorporated 1,3-diaxial interactions in a cyclohexyl backbone of the dipyrrolylmethane. Some of the enthalpic barrier created with the 1,3-steric interactions appears to be mediated by increased entropy in the ground state, but noticeable changes are produced in the pyrrolyl exchange rates by 1H NMR without steric crowding at the metal center.
Use of graphite oxide and graphene oxide as catalysts in the synthesis of dipyrromethane and calix[4]pyrrole
Singh Chauhan, Shive Murat,Mishra, Sweta
, p. 7256 - 7266 (2011)
Graphite oxide and graphene oxides have been used as solid catalysts for the synthesis of 5,5-dialkyldipyrromethanes and calix[4]pyrroles in organic and aqueous solutions at room temperature.
Dipyrromethane as a new organic reagent for the synthesis of gold nanoparticles: Preparation and application
Eshghi,Rahimizadeh,Attaran,Bakavoli
, p. 1151 - 1157 (2013/11/06)
Condensation reaction of several ketones with pyrrole in the presence of ferric hydrogen sulfate as a green homogenous acidic catalyst furnished the corresponding pure dipyrromethanes in good yields. Gold nanoparticles were produced through reduction of H
Highly efficient synthesis of N-confused meso-tetraspirocyclohexyl calix[4]pyrrole using Bronsted acidic ionic liquids as catalysts
Garg, Bhaskar,Ling, Yong-Chien
, p. 5674 - 5677 (2012/11/07)
An efficient, green and novel protocol is described for high yield synthesis of N-confused meso-tetraspirocyclohexyl calix[4]pyrrole. In aqueous solution, the condensation of pyrrole and cyclohexanone in the presence of Bronsted acidic ionic liquid catalysts afforded N-confused calix[4]pyrrole in up to 62.5% yield which represents a ～threefold yield improvement over existing protocol and makes significant quantity of N-confused calix[4]pyrrole readily available.
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.
