荧光 DNA 类似物:与 2-aminotroponyl-ethynyl-2'-deoxyuridinyl DNA oligo 相比,2-aminotroponyl-pyrrolyl-2'-deoxyuridinyl DNA oligo 增强 DNA 双链体中的荧光
摘要:
摘要 核碱基修饰的荧光 DNA 和 RNA 类似物是通过连接体结合芳香支架合成的,主要包含乙炔/乙烯或嘧啶/嘌呤环上的稠合环残基。这些支架主要来源于具有吸电子/供电子特性的苯类芳香族分子。然而,非苯类芳香支架如托酚酮和相关衍生物是各种托酚类天然产物的成分。nucleobases 与 troponyl 部分的共轭未被充分利用用于荧光 DNA 类似物的合成。本报告描述了 2-氨基托苯酰结合的脱氧尿苷核苷及其 DNA 类似物的合成和光物理研究。2-氨基托酮衍生物通过乙炔基接头/吡咯环融合及其 DNA 类似物在尿苷的 C-5 位置缀合。他们的光物理研究表明,氨基托苯酰脱氧尿苷类似物表现出溶剂依赖性荧光特性。此外,吡咯环融合的氨基托酰基 DNA 寡核苷酸在与天然 DNA 寡核苷酸的互补序列形成双链后增强荧光。因此,这些修饰的核苷和 DNA 是很有前途的荧光类似物,可用于设计序列特异性 DNA 探针。吡咯环融合的氨基托酰基
Studies on Seven-membered Ring Compounds. XX. Reactions of Troponeimine Derivatives. (2)
作者:Hideo Nakao、Nobuo Soma、Genshun Sunagawa
DOI:10.1248/cpb.13.828
日期:——
The reaction of 2-methoxytroponeimine (I) and its N-methyl derivative (II) with active methylene compounds were carried out. The reaction of I with malononitrile, ethyl cyanoacetate or cyanoacetamide in the presence of sodium ethoxide afforded rearrangemet products, that is 3-phenylacrylic acid derivatives. The same reaction in the absence of sodium ethoxide gave mainly 2-imino-1, 2-dihydrocyclohepta[b]pyrrole derivatives. However, the reaction of I with diethyl malonate afforded ethyl 2-oxo-8-methoxy-1, 2-dihydrocyclohepta[b]pyrrole-3-carboxylate. II showed some different reactivity from I. Namely, the reaction of II with active methylene compounds in the presence of sodium ethoxide afforded 2-imino-1, 2-dihydrocyclohepta[b]pyrrole derivatives besides rearrangement products.
Intramolecular Hydroamination with Homogeneous Zinc Catalysts: Evaluation of Substituent Effects inN,N′-Disubstituted Aminotroponiminate Zinc Complexes
作者:Maximilian Dochnahl、Karolin Löhnwitz、Jens-Wolfgang Pissarek、Mustafa Biyikal、Sabrina R. Schulz、Sebastian Schön、Nils Meyer、Peter W. Roesky、Siegfried Blechert
DOI:10.1002/chem.200601765
日期:2007.8.6
ethers, and aryl groups were employed. The corresponding aminotroponiminatezinccomplexes were then synthesized and characterized by a number of techniques, including by X-ray crystallography. Herein we report on the investigations into their activity in the intramolecular hydroamination of nonactivated alkenes. We also demonstrate that complexes bearing ligands with cyclic alkyl groups show superior
Novel fluorophores: Syntheses and photophysical studies of boron-aminotroponimines
作者:Chenikkayala Balachandra、Nagendra K. Sharma
DOI:10.1016/j.dyepig.2016.10.051
日期:2017.2
The syntheses and photophysical study of novel fluorescent boron-aminotroponimine complexes are described. The chemical structure of one of the boron complexes was confirmed by single crystal X-ray analysis, which shows the appearance of the distorted tetrahedral geometry at boron. The photophysical studies of these complexes revealed that the boron-aminotroponimines are fluorescent molecules with