作者:Sachin B. Wagh、Vladimir Maslivetc、James J. La Clair、Alexander Kornienko
DOI:10.1039/d0ra06962k
日期:——
It has become increasingly apparent that high-diversity chemical reactions play a significant role in the discovery of bioactive small molecules. Here, we describe an expanse of this paradigm, combining a ‘target-guided synthesis’ concept with Paal–Knorr chemistry applied to the preparation of fluorescent ligands for human prostaglandin-endoperoxide synthase (COX-2).
Indium-mediated one-pot pyrrole synthesis from nitrobenzenes and 1,4-diketones
作者:Hyunseung Lee、Byeong Hyo Kim
DOI:10.1016/j.tet.2013.05.113
日期:2013.8
One-pot reduction-triggered heterocyclizations of nitrobenzene derivatives with 1,4-diketones were investigated. In the presence of indium/AcOH in toluene at 80 degrees C, reaction of nitrobenzenes with 2,5-hexadione produced moderate to excellent yields (40-98%) of the corresponding pyrroles within 1.5-24 h depending on the substituents of the starting materials. Similarly, the reaction of nitrobenzenes with 1-phenyl-1,4-pantanedione in the presence of indium/AcOH in toluene at reflux afforded the corresponding pyrroles within 0.5-24 h with 60-98% yields. (C) 2013 Elsevier Ltd. All rights reserved.
Lederer; Paal, Chemische Berichte, 1885, vol. 18, p. 2598