Overcoming Barriers in Polycarbonate Synthesis: A Streamlined Approach for the Synthesis of Cyclic Carbonate Monomers
作者:Eddy W. P. Tan、James L. Hedrick、Pedro L. Arrechea、Tim Erdmann、Vivien Kiyek、Simon Lottier、Yi Yan Yang、Nathaniel H. Park
DOI:10.1021/acs.macromol.0c02880
日期:2021.2.23
Accessing cyclic carbonate monomers on a large scale is critical for the development of any new carbonate-based materials platform. The synthesis of carbonate monomers can be a challenging and tedious endeavor requiring multiple synthetic steps and purifications. To address this, we report a drastically improved process for the synthesis of carbonate monomers via a two-step route that avoids the use
Tetrafluorination of Aromatic Azide Yields a Highly Efficient Staudinger Reaction: Kinetics and Biolabeling
作者:Yonghui Xie、Longhuai Cheng、Yasi Gao、Xuekang Cai、Xing Yang、Long Yi、Zhen Xi
DOI:10.1002/asia.201800503
日期:2018.7.16
research fields of biomaterials and chemical biology. We found that the o,o′‐difluorinated aromatic azide was able to react with triphenylphosphine to produce water‐stable phosphanimine. To further improve the efficiency of this kind of nonhydrolysis Staudinger reaction, a tetrafluorinated aromatic azide was employed to develop a faster nonhydrolysis Staudinger reaction with a rate of up to 51 m−1 s−1
高效的生物正交反应的发展对于生物材料和化学生物学的研究领域至关重要。我们发现,Ô,O' -difluorinated芳香叠氮能够与三苯基膦,产生水稳phosphanimine反应。为了进一步提高这种非水解史陶丁格反应的效率,采用了四氟化芳族叠氮化物来开发更快的非水解史陶丁格反应,速率高达51 m -1 s -1如高效液相色谱(HPLC)分析和荧光动力学所揭示。作为概念验证研究,高效的Staudinger反应已成功用于蛋白质和核酸(DNA和RNA)的化学选择性荧光标记以及蛋白质聚乙二醇(PEG)的基化。我们相信,这种生物正交反应可以为各种生物缀合提供广泛有用的工具。
The present invention relates to a bifunctional hydroxy-bisphosphonic acid derivative of formula (I) below:
or a pharmaceutically-acceptable salt thereof,
a method for producing the same, pharmaceutical compositions containing the same,
and the use thereof as a medicament,
as well as a compound of formula (II) below:
or a pharmaceutically-acceptable salt thereof,
and the use thereof for producing a vectorized molecule of therapeutic or diagnostic purpose.