Efficient New Synthesis of<i>N</i>-Arylbenzo[<i>b</i>]furo[3,2-<i>d</i>]pyrimidin-4-amines and Their Benzo[<i>b</i>]thieno[3,2-<i>d</i>]pyrimidin-4-amine Analogues via a Microwave-Assisted Dimroth Rearrangement
libraries of N‐arylbenzo[b]furo[3,2‐d]pyrimidin‐4‐amines (1) and their novel benzo[b]thieno[3,2‐d]pyrimidin‐4‐amine analogues (2) was investigated for the first time. Title compounds were obtained via microwave‐accelerated condensation and Dimrothrearrangement of suitable anilines with N′‐(2‐cyanaryl)‐N,N‐dimethylformimidamides obtained by reaction of benzo[b]furane and benzo[b]thiophene precursors with
可以快速有效地访问N-芳基苯并[ b ]呋喃[3,2 - d ]嘧啶-4-胺类库(1)及其新型苯并[ b ]噻吩并[3,2 - d ]嘧啶-4-胺类库首次研究了类似物(2)。通过苯并[ b ]呋喃和苯并[ b ]噻吩前体与N,N的反应获得的N '-(2-氰芳基)-N,N-二甲基甲亚胺通过微波加速缩合和合适的苯胺的Dimroth重排获得标题化合物-二甲基甲酰胺二甲基乙缩醛。这项工作还证明,控制良好的参数可以舒适地使用微波技术,既安全又有益于环境。本文获得的某些产品表现出有趣的体外抗增殖作用。
Benzothiophenes and benzofurans and antiallergic use thereof
申请人:Warner-Lambert Company
公开号:US04703053A1
公开(公告)日:1987-10-27
Novel benzothiophene and benzofuran derivatives having antiallergic activity are described as well as a method of manufacture, pharmaceutical compositions, and methods of use therefor. The disclosure describes the use of derivatives for prevention of the release of mediators including histamine and leukotrienes from basophils and mast cells, and prevent respiratory burst in neutrophils providing activity useful in cardiovascular disorders as well as in antiinflammatory, psoriasis, and antimigraine treatment.
Synthesis of 4-(Phenylamino)quinazoline-2(1H)-selones and Diselenides from Isoselenocyanates:Dimroth Rearrangement of an Intermediate
作者:Plamen K. Atanassov、Anthony Linden、Heinz Heimgartner
DOI:10.1002/hlca.200490166
日期:2004.7
reaction mechanism via a Dimroth rearrangement of the primarily formed intermediate is presented in Scheme 3. The molecularstructures of 10 and 11a have been established by X-raycrystallography. Unexpectedly, no selone or diselenide was obtained in the case of the reaction with 3-aminobenzo[b]furan-2-carbonitrile (14). The only product isolated was the selenide 16 (Scheme 4), the structure of which
在干燥的吡啶中,蒽腈8与苯基异鲸蜡氰酸酯(1a)在回流下反应,得到4-(苯基氨基)喹唑啉-2(1H)-硒酮9(方案2)。它们很容易被氧化并转化为11型二硒化物。8a与异硫氰酸苯酯(1b)的类似反应产生了喹唑啉-2(1H)-硫酮10(方案2)。方案3中给出了通过初步形成的中间体的狄莫罗斯重排反应的反应机理。通过X射线晶体学已经确定了图10和11a。出乎意料的是,在与3-氨基苯并[ b ]呋喃-2-甲腈(14)反应的情况下,没有获得硒酮或二硒化物。分离出的唯一产物是硒化物16(方案4),其结构已通过X射线晶体学确定。
Polycyclic<i>N</i>-hetero compounds.<b>XXXIV</b>. Syntheses and evaluation of antidepressive activity of benzofuro-[2,3-<i>e</i>]imidazo[1,2-<i>c</i>]pyrimidines and their precursors
Syntheses of 2,3-dihydrobenzofuro[2,3-e]imidazo[1,2-c]pyrimidine and its 5-substituted derivatives, corresponding to B-nor-6-oxa-11,13,15-triazasteroids, are described. These products and their precursors were screened to evaluate the antidepressiveactivity.
描述了对应于B-nor-6-oxa-11,13,15-三氮杂甾体的2,3-二氢苯并呋喃[2,3- e ]咪唑并[1,2- c ]嘧啶及其5-取代衍生物的合成。筛选了这些产物及其前体以评估抗抑郁活性。
Convenient and Practical One-Pot Synthesis of 4-Chloropyrimidines via a Novel Chloroimidate Annulation
作者:Thomas Storz、Richard Heid、Joseph Zeldis、Steven M. Hoagland、Vito Rapisardi、Susan Hollywood、George Morton
DOI:10.1021/op1002352
日期:2011.7.15
Reaction of aromatic or heteroaromatic 2-acyl(amino)nitriles with phosphorus pentachloride triggers a novel chloroimidate cyclization, leading directly to the corresponding annullated 4-chloropyrimidines in good to excellent yields. The reaction lends itself to the telescoped one-pot construction of 4-functionalized pyrimidines from the corresponding (hetero)aromatic 2-aminonitriles. For a pyrazolopyrimidine development intermediate, this reaction was scaled up to multikilogram scale with excellent results. A total of 10 examples with different substrates are provided. This one-pot reaction provides an attractive and sustainable alternative to the commonly used multistep methodology for this transformation.