The pyrrole moiety as a template for COX-1/COX-2 inhibitors
摘要:
Aroyl- and thiophene-substituted pyrrole derivatives have been synthesized as a new class of COX-1/COX-2 inhibitors. The inhibition of COX-1 was evaluated in a biological system using bovine PMNLs as the enzyme source, whereas LPS-stimulated human monocytes served as the enzyme source for inducible COX-2. The determination of the concentration of arachidonic acid metabolites was performed by HPLC for COX-1 and RIA for COX-2. Variation of the substitution pattern led to a series of active compounds which showed inhibition for COX-1 and COX-2. Structural requirements for the development of COX-1/COX-2 inhibitors are discussed, (C) 2000 Editions scientifiques et medicales Elsevier SAS.
Solvent-Controlled C2/C5-Regiodivergent Alkenylation of Pyrroles
作者:Youla Su、Shang Gao、Yue Huang、Aijun Lin、Hequan Yao
DOI:10.1002/chem.201502418
日期:2015.10.26
A solvent‐controlled C2/C5‐selective alkenylation of 3,4‐disubstituted pyrroles has been developed. The C3 substituent of pyrroles proved crucial to the regioselectivity. Substrates bearing directing groups at the C3 position exhibited excellent C2‐selectivities in chelation‐assisted CH activation in toluene or 1,4‐dioxane. However, a DMSO/DMF solvent system could override the chelation effect of
Differential reactivity of β-amino enones and 3-dimethylaminoacrylaldehyde towards α-amino derivatives
作者:Angel Alberola、José M. Andrés、Alfonso González、Rafael Pedrosa、Martina Vicente
DOI:10.1039/p19900002681
日期:——
Unsubstituted β-aminoenones react with α-aminoderivatives by a well established route which implies a fast transamination process — 1,4-addition followed by elimination — and cyclodehydration of the intermediate to 3-functionalized pyrroles. In contrast, 3-dimethylaminoacrylaldehyde undergoes 1,2-addition followed by cyclization to give the final 2-substituted pyrroles. Isolation of the intermediates
A Direct Synthesis of 2-(Trimethylstannyl)pyrroles from Michael Acceptors and Stannylated Tosylmethyl Isocyanide<sup>1</sup>
作者:Harm P. Dijkstra、Ronald ten Have、Albert M. van Leusen
DOI:10.1021/jo972216y
日期:1998.8.1
A series of 2-(trimethylstannyl)pyrroles 3, with substituents at the 3- and 4-positions, is synthesized efficiently by a base-induced reaction of stannylated TosMIC with Michael accepters. Stills cross-couplings with bromobenzene and double cross-couplings with 1,4-dibromobenzene have been achieved successfully with the N-methyl derivative (5a) and the N-Boc derivative (6a) of 3-benzoyl-2-(trimethylstannyl)-4-phenylpyrrole (3a), despite the bulk of these stannylpyrroles. Homo coupling reactions of the same stannylpyrroles with the corresponding bromopyrroles (prepared from stannylpyrroles 3 and NBS) were unsuccessful, probably for steric reasons.
ALBEROLA, ANGEL;ANDRES, JOSE M.;GONZALEZ, ALFONSO;PEDROSA, RAFAEL;VICENTE+, J. CHEM. SOC. PERKIN TRANS. PT 1,(1990) N0, C. 2681-2685
作者:ALBEROLA, ANGEL、ANDRES, JOSE M.、GONZALEZ, ALFONSO、PEDROSA, RAFAEL、VICENTE+