Gas phase versus solution chemistry: on the reversal of regiochemistry of methylation of sp2- and sp3-nitrogens
摘要:
The nicotine analogue 3-(N,N-dimethylaminomethyl)pyridine 2, which reacts with methyl iodide in acetonitrile exclusively on the sp(3)-nitrogen, methylates exclusively on the pyridine nitrogen with trimethyloxonium in the gas phase. Calculations at the RHF/6-31G**//6-31G** level suggest that there is an interaction between the side chain nitrogen and hydrogens on the aromatic ring. This interaction affects both the conformation of 2 as well as the relative basicity of its two nitrogens. Calculations also indicate that, in the gas phase, the pyridine methylated product (no counterion) is more stable than the pyrrolidine methylated product. (C) 2001 Elsevier Science Ltd. All rights reserved.
This invention relates to nitroimidazoxadiazocine compounds having the general Formula I, pharmaceutical compositions and uses of the same. The invention also relates to methods of making such nitroimidazoxadiazocine compounds of Formula I.
Direct and selective synthesis of N,N-dimethylated amines from nitriles using methanol as C1 building blocks is reported using an air- and moisture-stable ruthenium complex. Following this process, various aromatic as well as aliphatic nitriles were converted to the corresponding N-methylated amines. Interestingly, tandem C-methylation as well as N-methylation was achieved by introducing multiple methyl
MOF-derived cobalt nanoparticles catalyze a general synthesis of amines
作者:Rajenahally V. Jagadeesh、Kathiravan Murugesan、Ahmad S. Alshammari、Helfried Neumann、Marga-Martina Pohl、Jörg Radnik、Matthias Beller
DOI:10.1126/science.aan6245
日期:2017.10.20
preparation entailed template assembly of cobalt-diamine-dicarboxylic acid metal organic frameworks on carbon and subsequent pyrolysis under inert atmosphere. The resulting stable and reusable catalysts were active for synthesis of primary, secondary, tertiary, and N-methylamines (more than 140 examples). The reaction couples easily accessible carbonyl compounds (aldehydes and ketones) with ammonia, amines
[EN] CYCLOBUTENEDIONE DERIVATIVES<br/>[FR] DÉRIVÉS DE CYCLOBUTÈNE-DIONE
申请人:PFIZER LTD
公开号:WO2010131145A1
公开(公告)日:2010-11-18
The present invention relates to compounds of the formula (I): to pharmaceutically acceptable salts therefore and to pharmaceutically acceptable solvates of said compounds and salts, wherein the substituents are defined herein; to compositions containing such compounds; and to the uses of such compounds in the treatment of various diseases, particularly inflammatory conditions.
Provided is a kynurenine production inhibitor comprising a nitrogen-containing heterocyclic compound represented by formula (I):
(wherein R
50
and R
51
may be the same or different and each represent a hydrogen atom or the like, G
1
and G
2
may be the same or different and each represent a nitrogen atom or the like, X represents formula (III):
(wherein m
1
and m
2
may be the same or different and each represent an integer of 0 or 1, Y represents an oxygen atom or the like, and R
6
and R
7
may be the same or different and each represent a hydrogen atom or the like),
R
1
represents optionally substituted lower alkyl or the like, R
2
represents a hydrogen atom or the like, and R
3
represents optionally substituted lower alkyl or the like), and the like.