合成了具有不同焦点取代基,表面基团,内部结构以及不同世代的一类新型的由外围芳族酯官能化的聚(苄基醚)树枝状和/或树枝状大分子,并且它们之间的结构-性质关系系统地研究了胶凝能力。这些树突中的大多数都能够在很宽的极性范围内凝胶化有机溶剂。不仅在胶凝能力上而且在热致,形态和流变学特征中均观察到明显的树突作用。公开了外围酯官能度和内部树状结构的细微变化显着影响了树突的胶凝行为。在研究的所有树突中,第二代和第三代树突以邻苯二甲酸间苯二甲酸二甲酯(DMIP)为外围基团的G 0 G 2 -Me和G 0 G 3 -Me表现出最佳的胶凝能力,并且在22种以上的芳香族和极性有机溶剂中形成了稳定的凝胶。最低临界胶凝浓度(CGC)达到2.0 mg mL -1,表明一个树枝状分子可截留约1.35×10 4个溶剂分子。通过结合单晶/粉末X射线衍射(XRD)分析和浓度依赖性(CD)/温度依赖性(TD)1来进一步研究凝胶形成的驱动力11
The present invention discloses a compound with the following formula (I), or a tautomer, mesomer, racemate, enantiomer, and diastereoisomer thereof, or a mixture form thereof, or a pharmaceutically acceptable salt thereof, or a prodrug molecule thereof, wherein D is selected from:
The invention further discloses the use of the compound in the preparation of drugs for preventing and/or treating cancers, and the use of the compound in the preparation of drugs for inhibiting cancer metastasis. The compound of the present invention can effectively inhibit the proliferation and metastasis of cancer cells by adjusting the acidity of a tumor microenvironment to achieve a better effect in clinical cancer treatment, and has broad application prospects.
Pyridinophanes as Two-Centre Phase-Transfer Catalyst for N-Alkylation Reaction
作者:Perumal Rajakumar、Manickam Dhanasekaran
DOI:10.1055/s-2006-926304
日期:——
The syntheticutility of water-soluble pyridinophanes 1 and 2 as an efficient two-centre phase-transfercatalyst for N-alkylation of indoles, imidazole, benzimidazole and benzotriazole has been explored. Application of such pyridinophanes for the synthesis of various precyclophanes involving bis-N alkylation is also described.
Heck reactions: a caveat on the use of palladium(II) PCP-type catalysts
作者:Kurt Kiewel、Yunshan Liu、David E. Bergbreiter、Gary A. Sulikowski
DOI:10.1016/s0040-4039(99)01938-3
日期:1999.12
A PCP-typecatalyst was prepared and examined within the context of intramolecular Heckreactions. A substrate possessing a 1,4-diene system effectively poisoned the PCP catalyst leading to no reaction. This behavior contrasts with the typical palladium(0) catalyst system.
A Pronounced Halogen Effect on the Organogelation Properties of Peripherally Halogen Functionalized Poly(benzyl ether) Dendrons
作者:Yu Feng、Hui Chen、Zhi-Xiong Liu、Yan-Mei He、Qing-Hua Fan
DOI:10.1002/chem.201504598
日期:2016.3.24
effect on the organogelation properties of poly(benzyl ether) dendrons is reported. A new class of poly(benzyl ether) dendrons with halo substituents decorating their periphery was synthesized and fully characterized. A systematic study on the gelation abilities, thermotropic behaviors, aggregated microstructures, and mechanical properties of self‐assembled organogels was performed to elucidate the
A new family of artificialtranscriptionfactor (ATF)‐based conjugates have been designed and synthesized as potent chemical nucleases. Polyamides as the important and efficient ATFs were used to modify and activate several anchor compounds. The results demonstrate that the resulting conjugates remarkably promote the rate accelerations and non‐random double‐strand DNAcleavage activity. Interestingly