The present invention provides a diamine derivative or the like represented by the general formula (I):
wherein Q represents an oxygen atom or the like, RG represents a hydrogen atom or the like, RI represents
(wherein p and r may be the same or different, and each represents 0 or the like, RA represents a hydrogen atom or the like, and RB and Rc may be the same or different, and each represents a hydrogen atom or the like), RH represents a hydrogen atom or the like, and RJ represents:
(wherein q and s may be the same or different, and each represents 0 or the like, RD represents a hydrogen atom or the like, and RE and RF may be the same or different, and each represents a hydrogen atom or the like) or the like}, etc.
Regioselective Synthesis of Heterocyclic Ketene N,N-, N,O- and N,S-acetals in Aqueous Medium
作者:Langpoklakpam Gellina Chanu、Okram Mukherjee Singh、Sang-Hun Jang、Sang-Gyeong Lee
DOI:10.5012/bkcs.2010.31.04.859
日期:2010.4.20
The reactions of ketene dithioacetals with ethane-1,2-diamine, propane-1,3-diamine, 2-aminoethanol, 3-aminopropanol, and 2-aminoethanethiol in ordinary water in the absence of any acid/base catalyst afforded the heterocyclic ketene N,N-, N,O- and N,S-acetals in good yields.
Novel diamine derivatives containing imidazolidinylidene propanedinitrile were synthesized and evaluated for histamine H(3) receptor-binding affinities. High-affinity ligands 3d, 3k, and 3n showed potent H(3) receptor antagonism and excellent selectivity over human H(1), H(2) and H(4) receptors.
Synthesis and biological activities of novel 1,3-bis[substituted-pyridyl (thiazolyl)methyl]-2-substitutedmethylideneimidazolidines
作者:Man Yan、Zai-Gang Luo、Xiao-Fei Zhu、De-Qing Shi
DOI:10.1002/jhet.5570450415
日期:2008.7
A series of novel 1,3-dissubstitutedpyridyl(thiazolyl)methyl-2-substituted-methylideneimidazolidine derivatives 2 and 4 were designed and synthesized via the N-alkylation of the disubstituted heterocyclic ketene aminal derivative 1. When 1 (R = CN, R' = COOC2H5) was used as the starting materials, mono N-alkylated reaction can take place in good yields owing to the presence of the intramolecular hydrogen
通过二取代的杂环烯酮缩醛衍生物1的N-烷基化反应,设计合成了一系列新型的1,3-二取代的吡啶基(噻唑基)甲基-2-取代的亚甲基亚咪唑烷衍生物2和4。当使用1(R = CN,R′= COOC 2 H 5)作为起始原料时,由于分子内氢键的存在,单N-烷基化反应可以高产率进行。但是,对于1(R = R’= CN),难以获得纯的单N-烷基化产物。目标化合物的结构通过IR,1 H NMR,EI-MS和元素分析,在2c情况下,通过单晶X射线衍射。初步的生物测定表明,某些标题化合物具有中等的杀真菌和杀虫活性。