Synthesis and nuclear magnetic resonance spectroscopic studies of 1-arylpyrroles
作者:Chang Kiu Lee、Jung Ho Jun、Ji Sook Yu
DOI:10.1002/jhet.5570370104
日期:2000.1
A series of m- and p-substituted 1-phenyl, 1-benzyl, 1-benzoyl, and 1-(2-phenylethyl)pyrroles was prepared and their 1H and 13C nmr spectroscopic characteristics were examined. In general, good correlations were observed between the chemical shift values of the βH and the βC of pyrroles [except 1-(2-phenylethyl)pyrroles] and the Hammettt σ. The observation may be explained in terms of the electronic
一系列的米-和p -取代的1-苯基,1-苄基,1-苯甲酰基,和1-(2-苯乙基)吡咯制备和它们的1 H和13 C NMR光谱特性进行了研究。一般情况下,被所述β的化学位移值之间观察到良好的相关性H和β吡咯C [除了1-(2-苯乙基)吡咯]和Hammetttσ。可以用取代基的电子效应来解释该观察结果,所述取代基通过吡咯环的βCs与m-和p之间的p轨道相互作用通过键和空间传输。苯环的Cs。还给出了苯环的1 H和13 C化学位移的1-吡咯基,1-吡咯基甲基和1-吡咯基取代基常数。
6-AMINO-PYRIMIDINE-4-CARBOXAMIDE DERIVATIVES AND RELATED COMPOUNDS WHICH BIND TO THE SPHINGOSINE 1-PHOSPHATE (S1P) RECEPTOR FOR THE TREATMENT OF MULTIPLE SCLEROSIS
申请人:Merck Serono Sa
公开号:US20130109669A1
公开(公告)日:2013-05-02
The invention relates to compounds of formula (I):
wherein X, W, Q, R, R
1
and R
2
have the meanings given in claim
1
. The compounds are useful e.g. in the treatment of autoimmune disorders, such as multiple sclerosis.
Suzuki–Miyaura Cross-Coupling of Potassium Trifluoro(<i>N</i>-methylheteroaryl)borates with Aryl and Heteroaryl Halides
作者:Gary A. Molander、DaWeon Ryu、Mona Hosseini-Sarvari、Rammohan Devulapally、Dave G. Seapy
DOI:10.1021/jo4009589
日期:2013.7.5
The synthesis of potassium trifluoro(N-methylheteroaryl)borates and their use in cross-coupling reactions with various aryl and heteroaryl halides to construct N-methyl heteroaryl-substituted aromatic and heteroaromatic compounds are reported.
An elegant protocol for the synthesis of N-substituted pyrroles through C–N cross coupling/aromatization process using CuFe2O4 nanoparticles as catalyst under ligand-free conditions
A simple and efficient, ligand-free C-N cross-coupling of aryl halides/benzyl bromides with trans-4-hydroxy-L-proline has been developed to produce aromatized N-substituted pyrroles, using a catalytic amount of magnetically separable and recyclable CuFe2O4 nanoparticles, in the presence of Cs2CO3 in DMSO at 100 degrees C. (C) 2014 Elsevier Ltd. All rights reserved.
An Atom-Economical Method for the Formation of Amidopyrroles Exploiting the Self-Assembled Resorcinarene Capsule
作者:Pellegrino La Manna、Carmen Talotta、Margherita De Rosa、Annunziata Soriente、Carmine Gaeta、Placido Neri
DOI:10.1021/acs.orglett.0c00529
日期:2020.4.3
Here is reported the first example of an organocatalyzed coupling between pyrrole and isocyanates in a nanoconfined space. The hexameric resorcinarene capsule C is able to catalyze the direct coupling between isocyanates and pyrroles to give amidopyrroles with excellent yields and selectivities. The reaction catalyzed by C prevents the use of expensive and poorly atom-economical reagents. As in natural