Lipophilic polythiamacrocycles as palladium extracting agents
作者:V. Guyon、A. Guy、J. Foos、M. Lemaire、M. Draye
DOI:10.1016/0040-4020(95)00147-z
日期:1995.4
dioctyl-18S6, were synthesized starting from different dithiols and dihalides. Cs2CO3 is used for the cyclizations. The extraction behavior of palladium (II) from nitric acid media with these reagents in chloroform has been studied in terms of extraction equilibrium constants Kex. The influence of parameters such as lipophilicity brought by alkyl chains, macrocyclic cavity size and number of sulfur donor atoms
从不同的位置开始合成了六种新的亲脂性硫杂冠醚(– ),分别缩写为2-辛基-9S3、2-辛基-10S3、2-辛基-12S4、6-辛基-14S4、3-辛基-16S4和二辛基-18S6。二硫醇和二卤化物。Cs 2 CO 3用于环化。根据萃取平衡常数K ex,研究了这些试剂在氯仿中从硝酸介质中萃取钯(II)的行为。研究了烷基链带来的亲脂性,大环孔尺寸和硫给体原子数等参数对萃取行为的影响。
BRADSHAW J. S.; CAMPBELL M. L.; HASSELL L. A.; BAXTER J. K., J. HETEROCYCL. CHEM., 1979, 16, NO 4, 721-723
作者:BRADSHAW J. S.、 CAMPBELL M. L.、 HASSELL L. A.、 BAXTER J. K.
DOI:——
日期:——
Highly Efficient Synthesis of Monodisperse Poly(ethylene glycols) and Derivatives through Macrocyclization of Oligo(ethylene glycols)
A macrocyclic sulfate (MCS)‐based approach to monodisperse poly(ethyleneglycols) (M‐PEGs) and their monofunctionalized derivatives has been developed. Macrocyclization of oligo(ethyleneglycols) (OEGs) provides MCS (up to a 62‐membered macrocycle) as versatile precursors for a range of monofunctionalized M‐PEGs. Through iterative nucleophilic ring‐opening reactions of MCS without performing group
Novel Bifunctional [16]aneS4-Derived Chelators for Soft Radiometals
作者:Natan J. W. Straathof、Charlotte B. Magnus、Fedor Zhuravlev、Andreas I. Jensen
DOI:10.3390/molecules26154603
日期:——
bifunctional derivatives. An ester-linked N-hydroxysuccimide ester (NHS, seven steps, 4% overall yield), an ether-linked isothiocyanate (NCS, eight steps, 5% overall yield) and an azide derivative were prepared. In addition, a new route to a carbon-carbon linked carboxylic acid functionalized derivative is presented. Finally, a general method for conjugating the NHS and NCS derivatives to a polar peptide (octreotide)