One-Pot Synthesis of Asymmetric Annulated Bis(pyrrole)s
作者:Deborah A. Smithen、T. Stanley Cameron、Alison Thompson
DOI:10.1021/ol202457n
日期:2011.11.4
Condensation of activated functionalized pyrroles with acetone results in asymmetricbis(pyrrole)s, formed via ring annulation. The methodology is somewhat general and can be applied to a variety of ketones, as well as to a range of pyrrolic substrates that do not bear electron-withdrawing groups directly adjacent to the pyrrole ring.
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.