内部炔烃与二溴异氰尿酸/ H 2 O反应,得到α,α-二溴酮和1,2-二酮衍生物。具有活化基团的二芳基炔烃提供1,2-二酮衍生物作为主要产物,而具有非活化基团的二芳基炔烃或烷基芳基炔烃提供的α,α-二溴酮衍生物为主要产物。此外,带有失活基团的二芳基炔烃可提供1,2-二溴烯烃。该反应在室温下进行,并且在大多数情况下显示出良好的产率。已经基于实验观察和密度泛函理论(DFT)计算提出了反应途径。
2,3‐Diarylbenzo[b]arsoles were synthesized from zirconacycles and diiodophenylarsine. The structural modification to the luminophore was attained through diarylacetylene precursors, Suzuki–Miyaura coupling, and oxidation of the arsenic atom. The emission properties were controlled according to these modifications. The 2,3‐diarylbenzo[b]arsoles showed aggregation‐induced emission enhancement; the stronger
由氧化锆环和二碘苯基[合成了2,3-二芳基苯并[ b ] arsole。通过二芳基乙炔前体,Suzuki-Miyaura偶联和砷原子的氧化获得了对发光体的结构修饰。根据这些修改来控制发射特性。2,3-二芳基苯并[ b ] arsoles表现出聚集诱导的发射增强。与溶液相比,固态观察到的发射更强。此外,Suzuki-Miyaura缩聚和烯烃复分解聚合分别生产了主链和侧链聚合物。所得聚合物显示出不同的发射行为,例如聚集引起的猝灭和聚集诱导的发射增强。
The intersection of allenylidenes and mesomeric betaines. 1-Methylpyridinium-2-acetylide and its palladium complexes
作者:Susanne Haindl、Jiayi Xu、Tyll Freese、Eike G. Hübner、Andreas Schmidt
DOI:10.1016/j.tet.2016.10.001
日期:2016.12
cumulene-type structure 1-methylpyridin-2-allenylidene. Palladium complexes have been prepared starting from 2-ethynylpyridine and Pd(PPh3)4 or PdCl2(PPh3)2 followed by methylation of the resulting complexes to the title compounds. Results of calculations and spectroscopic measurements are discussed with respect to the zwitterionic or allenylidene resonance forms.
d]indene derivatives. The synthetic methodology includes some of the prominent reaction steps as specified in sequence (i) Bromination of acetophenones (ii) Condensation of 2-bromo-1-(substituted phenyl) ethanone derivatives with 2-aminopyrimidine, and (iii) Coupling of imidazo[1,2-a]pyrimidine derivatives with 1,2-diaryl/diaklylethynes. The structures of the newly synthesized derivatives have been
本研究报告1,2-取代的2a1,4,5-三氮杂环戊[cd]茚衍生物的合成。合成方法包括序列中指定的一些重要反应步骤(i)苯乙酮的溴化(ii)2-溴-1-(取代的苯基)乙酮衍生物与2-氨基嘧啶的缩合反应,以及(iii)咪唑并[具有1,2-二芳基/二烯丙基乙炔的1,2-a]嘧啶衍生物。新合成的衍生物的结构已通过1 H NMR测定,1313 C NMR,LC-MS和IR光谱分析。此外,使用角叉菜胶诱导的爪水肿试验方法筛选了这些衍生物的初步抗炎活性。这些令人鼓舞的筛选结果表明,现有化合物的分子多样性具有巨大潜力,可以将其充实为更好的潜在候选化合物。
Two near-UV and visible chromophores of CpCo(Dithiolene) complexes with pyridinium-dicyanomethylide group
Tetracyanoethylene oxide (TCNEO) reacted with [CpCo(dithiolene)] (Cp = η5-cyclopentadienyl) complexes having 4-pyridyl or 3-pyridyl group to undergo a dicyanomethylation to the nitrogen atom on the pyridyl group. The reaction of [CpCo(S2C2(4Py)2)] (1) with TCNEO formed both the monodicyanomethylated [CpCo(S2C2(4Py)(4Py–C(CN)2))] (1a) and bisdicyanomethylated [CpCo(S2C2(4Py–C(CN)2)2)] (1b). [CpCo(S2C2(2Py)(4Py))]
四氰乙烯氧化物(TCNEO)与[CpCo(二硫)](CP =反应 η 5具有4-吡啶基或3-吡啶基-环戊二烯基)配合物经过dicyanomethylation对吡啶基上的氮原子。[CpCo(S 2 C 2(4 Py)2)](1)与TCNEO的反应形成了单二氰甲基化的[CpCo(S 2 C 2(4 Py)(4 Py–C(CN)2)))](1a)和双双氰基甲基化[CpCo(S 2 C 2(4 Py–C(CN)2)2)](1b)。[CpCo(S 2 C 2(2 Py)(4 Py))](2)与TCNEO反应得到[CpCo(S 2 C 2(2 Py)(4 Py–C(CN)2))](2a),但在2-吡啶基上没有发生二氰基甲基化。2与过量的TCNEO反应形成唯一的双氰基甲基化乙炔衍生物2 Py–C C–(4 Py–C(CN)2)(2c),然后解离CpCoS 2片段。单二氰甲基化[CpCo(S 2 C2(Ñ
NOVEL CHEMISTRY USED IN BIOSENSORS
申请人:OHMX Corporation
公开号:US20130112572A1
公开(公告)日:2013-05-09
The invention relates to novel compositions of 1,3-disubstituted ferrocenes useful for the modification of electrodes.