1-(2-硝基苯基)-1H-吡咯-2-甲醛 在
钯氩 、 乙醚 、 hexanes 作用下,
以
乙醇 、 乙酸乙酯 为溶剂,
反应 2.0h,
以to give 0.35 g of the desired product as a beige solid m.p. 108°-110° C.的产率得到4,5-dihydropyrrolo[1,2-a]quinoxaline
Expeditious Synthesis of Imidazole- and Pyrrole-Fused Benzodiazocines
作者:Amita Mishra、Sanjay Batra
DOI:10.1002/ejoc.201000355
日期:2010.9
A straightforward strategy for the synthesis of imidazole-fused benzodiazocine from 1-(2-nitrophenyl)-1H-imidazole-2-carbaldehyde via Morita–Baylis–Hillman reaction followed by reductive intramolecular cyclization is described. Alternatively the Horner–Wadsworth–Emmons reaction of this substrate with triethyl phosphonoacetate yielded (E)-ethyl 3-(1-(2-nitrophenyl)-1H-imidazol-2-yl)acrylate which upon
[EN] N-MODIFIED AMINOGUANIDINE DERIVATIVES<br/>[FR] DÉRIVÉS D'AMINOGUANIDINE MODIFIÉS EN POSITION N
申请人:ACTION PHARMA AS
公开号:WO2009071101A1
公开(公告)日:2009-06-11
The invention relates to novel phenyl pyrrole aminoguanidine derivatives modified at the guanidine group. The invention further relates to the use of such phenyl pyrrole aminoguanidine derivatives for the treatment of diseases associated with the melanocortin receptors or related systems, e.g. inflammation and inflammatory conditions. The novel phenyl pyrrole aminoguanidine derivatives of the invention have the general formula (I) and includes tautomeric and isomeric forms thereof, wherein X is (CH2)n and n is 0, 1 or 2.
The present invention relates to phenyl pyrrole aminoguanidine derivatives of the general formula (I): (I) including tautomeric forms thereof, wherein n is 1, 2 or 3; or a pharmaceutically acceptable salt thereof. The present invention further relates to the use of such phenyl pyrrole aminoguanidine derivatives for the treatment of diseases associated with the melanocortin receptors or related systems, e.g. the melanocyte stimulating hormones.
The present invention relates to phenyl pyrrole aminoguanidine derivatives of the general formula (I): (I) including tautomeric forms thereof, wherein n is 1, 2 or 3; or a pharmaceutically acceptable salt thereof. The present invention further relates to the use of such phenyl pyrrole aminoguanidine derivatives for the treatment of diseases associated with the melanocortin receptors or related systems, e.g. the melanocyte stimulating hormones.
Sodium dithionite mediated one-pot, tandem chemoselective reduction/cyclization for the synthesis of pyrrole fused <i>N</i>-heterocycles
作者:Joydev K. Laha、Surabhi Panday、Pankaj Gupta、Shiv Raj Seth
DOI:10.1039/d2gc03749a
日期:——
undergoes reaction with the ester group to form quinoxalones. The protocol features an efficient one-pot, tandem reductive cyclization performed at room temperature, very short reaction time (1 h), no aqueous work up, purification by crystallization, isolated yields generally >90%, appreciable functional group tolerance, and wide substrate scope. The scalability of the developed protocol is further
在醛基或酯基存在的情况下,硝基的化学选择性还原与另一种合成转化相结合,从而方便地合成重要的杂环,是当前研究的主题。N -(2-硝基苯基)吡咯-2-甲醛的化学选择性还原环化仅伴随工业试剂连二亚硫酸钠 (Na 2 S 2 O 4 ) 产生不同取代的吡咯稠合N -杂环已首次开发。原位生成的氨基通过化学选择性还原硝基与醛基缩合形成喹喔啉,或与酯基反应形成喹喔啉酮。该协议具有在室温下进行的高效单锅串联还原环化、非常短的反应时间(1 小时)、无水后处理、结晶纯化、分离产率通常 >90%、可观的官能团耐受性和广泛的底物范围。克级合成进一步证明了所开发协议的可扩展性。