Synthesis of 3-Pyrrolines, Annulated 3-Pyrrolines, and Pyrroles from α-Amino Allenes
作者:R. Karl Dieter、Huayun Yu
DOI:10.1021/ol016654+
日期:2001.11.1
[GRAPHICS]alpha -Amino allenes, readily prepared from reaction of alpha-(N-carbamoyl)alkylcuprates with propargyl substrates followed by N-Boc deprotection, are converted in high yields to pyrrolines with AgNO3. Palladium-catalyzed cyclization of amino allenes affords either the pyrroline or the pyrrole depending on reaction conditions and provides for introduction of an aryl substituent at the C-3 position of the pyrroline or pyrrole. Enantioenriched pyrrolines are readily prepared from scalemic propargyl alcohols.
Nonsteriodal Antiinflammatory Agents, XVII: Inhibition of Bovine Cyclooxygenase and 5-Lipoxygenase byN-Alkyldiphenyl-pyrrolyl Acetic and Propionic Acid Derivatives
作者:G. Dannhardt、M. Lehr
DOI:10.1002/ardp.19933260308
日期:——
A series of 19 N‐alkyl‐diarylpyrrolyl‐acetic and ‐propionicacidderivatives was synthesized and tested. Using bovine blood as enzyme source the inhibition of cyclooxygenase and 5‐lipoxygenase, respectively, was applied to determine the antiinflammatory activity. In general all compounds tested inhibit 5‐lipoxygenase more effectively than cyclooxygenase. A structure‐activity relationship is discussed