A facile synthesis of 5-alkoxypyrrol-2(5H)-ones using a modified aza-Achmatowicz oxidation
摘要:
An efficient approach to 2,4-disubstituted pyrroles has been uncovered and is based on an oxidative rearrangement of a furanyl carbamate followed by sequential reaction of the resulting 5-methoxypyrrol-2(5H)-one with various alkyl lithiates. The final step of the procedure involves heating the ring opened 1-methoxy-5-oxopentylcarbamate with a primary amine. The overall process can be carried out under mild conditions and complements existing methods to prepare 2,4-disubstituted pyrroles. (C) 2009 Elsevier Ltd. All rights reserved.
Several Convenient Methods for the Synthesis of 2-Amido Substituted Furans
作者:Albert Padwa、Kenneth R. Crawford、Paitoon Rashatasakhon、Mickea Rose
DOI:10.1021/jo026757l
日期:2003.4.1
Several new methods for the synthesis of differently substituted 2-amidofurans are described. The thermolysis of furan-2-carbonyl azide results in a Curtius rearrangement and the resulting furanyl isocyanate was trapped with various organometallic reagents. A second method consists of a C-N cross-coupling reaction of a bromo-substituted furan with various amides, carbamates, and lactams. The CuI-catalyzed
Synthesis of Secondary Amides from<i>N</i>-Substituted Amidines by Tandem Oxidative Rearrangement and Isocyanate Elimination
作者:Pradip Debnath、Mattijs Baeten、Nicolas Lefèvre、Stijn Van Daele、Bert U. W. Maes
DOI:10.1002/adsc.201400648
日期:2015.1.12
The periodinane reagents are obtained from the commercially available phenyliodine(III) diacetate [PhI(OAc)2, (PIDA)] by ligand exchange with carboxylic acids. The N‐substituted amidine substrates are easily synthesized from readily available nitriles. The method is applicable for secondary amide synthesis, based on both aliphatic and (hetero)aromatic amines, including challenging amides consisting
A SIMPLE AND EFFICIENT PROCEDURE FOR THE BECKMANN REARRANGEMENT OF OXIME USING<i>bis</i>-(TRICHLOROMETHYL) CARBONATE/DMF
作者:W. K. Su、Y. Zhang、J. J. Li、P. Li
DOI:10.1080/00304940809458118
日期:2008.12
also be used for the Beckmannrearrangement with satisfactory results under mild conditions (Scheme 1). Jochims et al." have reported that oximes react with oxalyl chloride in the presence of Lewis acid to give nitrilium salts which then rearrange. Compared with this method, our procedure is much easier to control and more environmentally friendly. Acetophenone oxime (mixture of E/Z isomers) was used
Disclosed are compounds and pharmaceutically acceptable salts of Formula I
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, n, Q
1
, Q
2
, Q
3
, Y, and X
1
-X
4
are as defined herein. Compounds of Formula I are useful in the treatment of diseases and/or conditions related to cell proliferation, such as cancer, inflammation, arthritis, angiogenesis, or the like. Also disclosed are pharmaceutical compositions comprising compounds of the invention and methods of treating the aforementioned conditions using such compounds.
Disclosed are compounds and pharmaceutically acceptable salts of Formula I
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, n, Q
1
, Q
2
, Q
3
, Y, and X
1
-X
4
are as defined herein. Compounds of Formula I are useful in the treatment of diseases and/or conditions related to cell proliferation, such as cancer, inflammation, arthritis, angiogenesis, or the like. Also disclosed are pharmaceutical compositions comprising compounds of the invention and methods of treating the aforementioned conditions using such compounds.