Palladium-Catalyzed Carbonylative Cyclization of Terminal Alkynes and Anilines to 3-Substituted Maleimides
作者:Jian-Xing Xu、Xiao-Feng Wu
DOI:10.1002/adsc.201800672
日期:2018.9.3
Herein, we describe an interesting palladium‐catalyzed protocol for the carbonylative synthesis of 3‐substituted maleimides. By annulation of simple anilines with terminal alkynes under carbon monoxide pressure, the desired 3‐substituted maleimides can be obtained in 50–85% yields. Additionally, with the addition of phosphine ligand, maleic acid isoimide can be obtained from the same substrates as
在这里,我们描述了一个有趣的钯催化方案,用于3-取代的马来酰亚胺的羰基合成。通过在一氧化碳压力下用末端炔烃对简单的苯胺进行环化处理,可以以50-85%的产率获得所需的3-取代的马来酰亚胺。另外,通过添加膦配体,也可以从相同的底物获得马来酸异酰亚胺。在存在K 2 S 2 O 8的情况下,可以将所获得的马来酸异酰亚胺完全转化为相应的马来酰亚胺。
Cu/Ag-Cocatalyzed Aerobic Oxidative Amination and CuCl<sub>2</sub>-Mediated Aerobic Oxidative Chloroamination of Maleimides
An efficient Cu(OAc)2/Ag2CO3-cocatalyzed approach for the synthesis of 3-aminomaleimides and 3-amino-4-indolylmaleimides has been developed with satisfactory yields. A series of primary and secondary amines are compatible with this reaction. In addition, treatment of maleimides with primary amines using 1 equiv. of CuCl2 leads to the formation of chloroamination products such as 3-amino-4-chloromaleimides
A catalytic oxidative carbonylation reaction was developed for the synthesis of polysubstituted maleimides from alkynes and amines with air as a green oxidant. This novel transformation proceeds in the presence of palladium chloride without the need for expensive ligands or additives and has a broad substrate scope affording a variety of maleimides in good to high yields.
PHENYL SUBSTITUTED MALEIMIDES AS MEDICAMENTS FOR BLOCKING DEGENERATIVE TISSUE DAMAGES BY INHIBITING MPT
申请人:Pellicci PierGiuseppe
公开号:US20100099736A1
公开(公告)日:2010-04-22
The invention discloses the use of a compound of formula (I), wherein R
1
, R
2
, R
3
, and R
4
each independently represents: hydrogen; halo; hydroxy; (C
1
-C
6
) alkyl optionally substituted by hydroxy or (C
1
-C
4
) alkoxy; (C
1
-C
6
) haloalkyl; (C
1
-C
6
) alkoxy; and (C
1
-C
6
) haloalkoxy; for the preparation of a medicament for the prevention and/or treatment of diseases resulting from opening of the MPTP which are characterized by degenerative tissue damages, in particular, diabetes and diabetic complications, neurological diseases and stroke, heart infarction, inherited dystrophies and hepatitis, more particularly, diabetic vascular diseases, such as diabetic retinopathy, and neurodegenerative disorders, such as multiple sclerosis. Further objects are a group of selected individual compounds of formula (I) for use as medicaments and a further group of selected individual compounds of formula (I) as novel compounds.
Synthesis of 2-arylmaleimides via the Heck reaction
作者:Alexander I. Roshchin、Evgeny V. Polunin
DOI:10.1016/j.mencom.2008.11.016
日期:2008.11
The Heck reaction of maleimides with aryl iodides in the presence of PdCl2(MeCN)(2), Bu4NCl and HCOOK affords the corresponding 2-arylmaleimides in moderate yields.