Modification of the chelate ring structure of technetium-99m(99mTc) dithiosemicarbazone (DTS) chelate was carried out in pursuit of a more stable and lipophilic compound. A new DTS chelating molecule, pentane-2, 4-dione bis(N-methylthiosemicarbazone) (PETS), with a 5-6-5 membered chelate ring stracture, was synthesized and labeled with 99mTc. PETS generated two 99mTc compounds as major products. Both had much higher stability and lipophilicity than a 5-5-5 membered 99mTc DTS compound, as well as great stability in plasma. Both 99mTc-PETS compounds were rapidly extracted by the brain and heart when injected into mice. Thus, the modified chelate ring structure afforded a preferable characteristics to DTS chelate as for the chelating site for technetium radiopharmaceuticals.
A novel synthesis of bisthiosemicarbazones of pentane-2,4-dione
作者:C. N. O'Callaghan、Dermot Twomey
DOI:10.1039/j39670002400
日期:——
1,2-Bis-(1-methyl-3-oxobutylideneamino)ethane on treatment with thiosemicarbazides yields bisthiosemicarbazones of pentane-2,4-dione. It is suggested that reaction takes place via a 1,4-diazepine intermediate. 1,4-Diazepine derivatives yield similar bisthiosemicarbazones on reaction with thiosemicarbazides.
Thiosemicarbazone Complexes of Indium with New Modes of Coordination: X-ray Crystal Structure of {(Me<sub>2</sub>In)<sub>2</sub>[NC<sub>5</sub>H<sub>4</sub>CMeNNC(S)NC<sub>6</sub>H<sub>5</sub>]<sub>2</sub>}(InMe)
作者:Cheolki Paek、Sang Ook Kang、Jaejung Ko、Patrick J. Carroll
DOI:10.1021/om970119p
日期:1997.10.1
The trinuclear complex (Me2In)2[NC5H4CMeNNC(S)NC6H5]2}(InMe) (3) has been prepared. X-ray analysis reveals that the two indium moieties are coordinated to the three nitrogen atoms in the ligand and the one indium moiety is attached to the two nitrogen and two sulfur atoms of the two ligands. The trinuclear nature and unusual distorted-square-pyramidal coordination geometry of the indium centers for
制备了三核络合物(Me 2 In)2 [NC 5 H 4 CMeNNC(S)NC 6 H 5 ] 2 }(InMe)(3)。X射线分析表明,两个铟部分与配体中的三个氮原子配位,一个铟部分与两个配体的两个氮和两个硫原子相连。通过单晶X射线衍射分析证实了3位铟中心的三核性质和不寻常的扭曲的方金字塔形配位几何。
US4915931A
申请人:——
公开号:US4915931A
公开(公告)日:1990-04-10
Acetylacetonate bis(thiosemicarbazone) complexes of copper and nickel: towards new copper radiopharmaceuticals
作者:Andrew R. Cowley、Jonathan R. Dilworth、Paul S. Donnelly、Antony D. Gee、Julia M. Heslop
DOI:10.1039/b406429a
日期:——
A series of copper(II) and nickel(II) 1,3-bis(thiosemicarbazonato) complexes have been synthesised by the reaction of the metal acetates with pyrazoline proligands. In each case the complexes have an overall neutral charge with a dianionic ligand. The copper 1,3-bis(4-methyl-3-thiosemicarbazonato complex has been characterised by X-ray crystallography, which shows the copper is in an essentially square-planar