The structure of [C3H4N2]+· and [C5H5N2]+ ions formed from vinylimidazoles, studied by collisionally activated dissociation mass spectrometry
摘要:
AbstractMass spectra of the three isomeric vinylimidazoles have been compared and the structures of the fragment ions [C3H4N2]+· and [C5H5N2]+ have been investigated by collisionally activated dissociation mass spectrometry. The greater part of the non‐decomposing ions m/z 68 from 2‐vinylimidazole and from 2‐imidazolecarboxylic acid methyl ester, and a minor part of this ion formed from the free acid, all have the same structure: the imidazole ring system, with hydrogens at both nitrogen atoms but none at C(2). An analogous structure, with an ethyl group at C(2), is proposed for the m/z 93 ion from 2‐vinylimidazole.
measurements. The results demonstrated that the sizes of poly(ionicliquid) (PIL)-based nanogels can be tuned by the feed ratio of the monomers and DSDMA. Moreover, the redox-response performances of these nanogels were evaluated through the size variation in the presence of dithiothreitol (DTT) and benzoyl peroxide (BPO). The capability of PIL-based nanogels for controlled release was also investigated by
对于解决细胞内和细胞外屏障的新型和多功能递送系统,独特的二硫键化学已被广泛探索。在这项研究中,通过基于离子液体(IL)的单体1,正丁基二溴3,3'-双-1-乙烯基咪唑二溴化物([C n VIm] Br,n = 4、6),以及在选择性溶剂中的二硫化二甲基丙烯酸二甲酯(DSDMA)。使用扫描电子显微镜(SEM),傅立叶变换红外(FTIR)光谱,热重分析(TG),动态激光散射(DLS)和Zeta(ζ)对合成后的纳米凝胶进行表征)电位测量。结果表明,可以通过单体和DSDMA的进料比来调节基于聚(离子液体)(PIL)的纳米凝胶的尺寸。此外,通过在二硫苏糖醇(DTT)和过氧化苯甲酰(BPO)存在下的尺寸变化来评估这些纳米凝胶的氧化还原响应性能。通过使用罗丹明B(RhB)作为原型模型药物,还研究了基于PIL的纳米凝胶的控释能力。发现可以通过DTT触发释放RhB。因此,可以通过基于PIL的纳米凝胶方便地制
Dehydration of glucose into 5-hydroxymethylfurfural in SO3H-functionalized ionic liquids
作者:Fu-Rong Tao、Chen Zhuang、Yue-Zhi Cui、Jing Xu
DOI:10.1016/j.cclet.2014.01.044
日期:2014.5
Abstract The continuous dehydration of d -glucose into 5-hydroxymethylfurfural (HMF) was carried out under mild conditions, using SO 3 H-functionalized acidic ionicliquids as catalysts and H 2 O-4-methyl-2-pentanone (MIBK) biphasic system as solvent. High glucose conversion of 97.4% with HMF yield of 75.1% was obtained at 120 °C for 360 min, also, small amounts of levulinic acid (LA) and formic acid
A variety of amphiphobic porous materials are provided. The materials can include a variety of porous frameworks that have an outer surface functionalized by a plurality of perfluoroalkyl moieties. By careful selection of appropriate perfluoralkyl moieties, hydrophobic properties can be imparted to the exterior surface of the porous materials without significantly impacting the wetting properties of the porous interior. This can be used to create a variety of highly amphiphobic porous materials. Methods of making and using the amphiphobic porous materials are also provided.
[EN] TRIAZINE COMPOUNDS AS KINASE INHIBITORS<br/>[FR] COMPOSÉS DE TRIAZINE COMME INHIBITEURS DE LA KINASE
申请人:S BIO PTE LTD
公开号:WO2009093981A1
公开(公告)日:2009-07-30
The present invention relates to triazine compounds that are useful as kinase inhibitors. More particularly, the present invention relates to morpholino substituted triazines, methods for their preparation, pharmaceutical compositions containing these compounds and uses of these compounds in the treatment of proliferative disorders. These compounds may be useful as medicaments for the treatment of a number of proliferative disorders including tumours and cancers as well as other disorders or conditions related to or associated with mTOR kinases or PI3 kinases. The compounds are of the formula (I).
Synthesis of [5,6]-Bicyclic Heterocycles with a Ring-Junction Nitrogen Atom: Rhodium(III)-Catalyzed C−H Functionalization of Alkenyl Azoles
作者:Kim Søholm Halskov、Howard S. Roth、Jonathan A. Ellman
DOI:10.1002/anie.201703967
日期:2017.7.24
The first syntheses of privileged [5,6]‐bicyclic heterocycles, with ring‐junction nitrogen atoms, by transition metal catalyzed C−H functionalization of C‐alkenyl azoles is disclosed. Several reactions are applied to alkenyl imidazoles, pyrazoles, and triazoles to provide products with nitrogen incorporated at different sites. Alkyne and diazoketone coupling partners give azolopyridines with various