"2 + 1" Dithiocarbamate (DTC)-isocyanide (ISO) system was studied to label amino acids and model peptides with Tc-99m(CO)(3)(+) fragment. Two ways were used: (i) conjugation via free carboxy group of bifunctional DTC [S2CNMe2- (L3), S2CNHCH2COO2- (L1) and S2C(C4H7N)COO2- (L2)] using pre-labeling procedure and (ii) conjugation via isocyanide ligand [tert-BuNC (L4), EtOC(O)CH2NHC(O)CH2NC (L5), and gly-gly-gly-CH2NHC(O)CH2NC (L6)]. Complexes M(CO)(3)L2L4(-) (1a, 1b), M(CO)(3)L3L4- (2a, 2b) and bioconjugates M(CO)(3)L1L5 (5a, 5b), and M(CO)(3)L1L6 (6b) (a, M = Re; b, Tc-99m) were synthesized. Bioconjugates 4a and 4b were prepared by reaction of histidine methyl ester with 2a and 2b, respectively. All rhenium complexes were characterized by H-1 and C-13 NMR, IR, and MS spectroscopy and complexes with 99mTc, by HPLC using rhenium analogs as references. (C) 2004 Elsevier B.V. All rights reserved.
"2 + 1"双
硫代
氨基甲酸酯(DTC)-异
氰化物(ISO)系统被研究用于使用Tc-99m(CO)₃⁺片段标记
氨基酸和模型肽。采用两种方法:(i) 利用双功能DTC的游离
羧酸基团进行偶联([S₂CNMe₂-(L₃)、S₂CNHCH₂COO₂⁻(L₁)和S₂C(C₄H₇N)COO₂⁻(L₂)]),采用预标记程序;(ii) 利用异
氰化物
配体([tert-BuNC (L₄)、EtOC(O)CH₂NHC(O)CH₂NC (L₅)、以及gly-gly-gly-CH₂NHC(O)CH₂NC (L₆)])进行偶联。合成了复合物M(CO)₃L₂L₄⁻ (1a, 1b)、M(CO)₃L₃L₄⁻ (2a, 2b)和
生物缀合物M(CO)₃L₁L₅ (5a, 5b)以及M(CO)₃L₁L₆ (6b)(a为Re,b为Tc-99m)。
生物缀合物4a和4b分别通过
组氨酸甲酯与2a和2b反应制备。所有
铼复合物通过H-1和C-13 NMR、IR及MS光谱表征,而含99mTc的复合物通过HPLC表征,以
铼类似物为参考。© 2004 Elsevier B.V. 保留所有权利。