Synthesis of Organometallic Poly(dendrimer)s by Macromonomer Polymerization: Effect of Dendrimer Size and Structural Rigidity on the Polymerization Efficiency
propagation: The copolymerization behavior of a dendritic macromonomer with a metal‐containing linker is controlled by the dendrimer size and its structuralrigidity. Structurally more flexible dendritic monomers tend to form more cyclic oligomers than structurally rigid monomers (see figure).
PROCESS FOR PREPARATION OF DIETHYLENETRIAMINEPENTAACETIC ACID DERIVATIVE, AND DIETHYLENETRIAMINEPENTAACETIC ACID DERIVATIVE
申请人:Nemoto Hisao
公开号:US20120203027A1
公开(公告)日:2012-08-09
The objective of the present invention is to provide a process for simple and efficient preparation of an intermediate compound to synthesize a gadolinium complex having a substituent for improving a retention property in blood time and specificity to an intended organ. The objective of the present invention is also to provide an intermediate compound produced by the said production process. The process for preparation of the diethylenetriaminepentaacetic acid derivative (I):
wherein R
1
to R
5
are independently C
1-6
alkyl groups;
comprising the steps of:
reacting a diethylenetriaminepentaacetic acid pentaester with a halogenated ally compound in an aprotic solvent;
removing the excess halogenated ally compound (III); and
reacting a reaction product of the diethylenetriaminepentaacetic acid pentaester and the halogenated ally compound with a base in a solvent.
purpose, we synthesized and evaluated compounds, namely, vesamicol derivatives, in which alkyl chains of varying chain length were introduced between a piperazine ring and a benzenering. The binding affinity of the vesamicol derivatives for the sigma-1 receptor tended to increase depending on the length of the alkyl chain between the benzenering and the piperazine ring. The sigma-1 receptor of 2-(4-(3
containing a disulfide group formed two‐component gels, which showed different solvent properties from gels without the disulfide group. The disulfidegels reacted with goldnanoparticles, and the resulting organic–inorganic compositematerials exhibited fluorescence emission between 600–800 nm, along with emission from the oligomers at 450 nm. The disulfidegels and isolated goldnanoparticles loaded with
Process for preparing 1-bromoalkylbenzene derivatives and intermediates thereof
申请人:SUMITOMO CHEMICAL COMPANY LIMITED
公开号:EP0637580A1
公开(公告)日:1995-02-08
A 1-bromoalkylbenzene derivative is prepared by reacting a phenylalkene derivative with hydrogen bromide in the presence of a non-polar solvent. The phenylalkene derivative is prepared by reacting an alkenyl halide with metal magnesium to form a Grignard reagent, and then reacting the Grignard reagent with a benzyl halide derivative. An allyl Grignard reagent is prepared by reacting continuously an allyl halide derivative with metal magnesium in an organic solvent, in which the allyl halide derivative and metal magnesium are continuously added to the reaction system and the allyl Grignard reagent formed is continuously removed from the reaction system. The processes provide the intended compounds in high yields, high selectivities and high purities.
1-bromoalkylbenzene derivative is prepared by reacting a phenylalkene derivative with hydrogen bromide in the presence of a non-polar solvent.苯基烷烃衍生物的制备方法是先使烯基卤化物与金属镁反应生成格氏试剂,然后使格氏试剂与苄基卤化物衍生物反应。烯丙基格氏试剂是通过烯丙基卤化物衍生物与金属镁在有机溶剂中连续反应制备的,其中烯丙基卤化物衍生物和金属镁被连续加入反应体系,形成的烯丙基格氏试剂被连续从反应体系中移除。这些工艺可提供高产率、高选择性和高纯度的预期化合物。