[EN] DIRECT SYNTHESIS OF 18F-FLUOROMETHOXY COMPOUNDS FOR PET IMAGING AND THE PROVISION OF NEW PRECURSORS FOR DIRECT RADIOSYNTHESIS OF PROTECTED DERIVATIVES OF O-([18F]FLUOROMETHYL) TYROSINE [FR] SYNTHÈSE DIRECTE DE COMPOSÉS DE 18F-FLUOROMÉTHOXY POUR L'IMAGERIE TEP ET UTILISATION DE NOUVEAUX PRÉCURSEURS POUR LA RADIOSYNTHÈSE DIRECTE DE DÉRIVÉS PROTÉGÉS DE O-([18F]FLUOROMÉTHYL)TYROSINE
5-(1<i>H</i>-Benzotriazol-1-yloxy)-3,4-dihydro-1-methyl 2<i>H</i>-Pyrrolium Hexachloroantimonate (BDMP<sup>®</sup>): A Highly Efficient Immonium Type Peptide Coupling Reagent
作者:Peng Li、Jie Cheng Xu
DOI:10.1246/cl.1999.1163
日期:1999.11
HOBt-based immonium type coupling reagent, 5-(1H-benzotriazol-1-yloxy)-3,4-dihydro-1-methyl 2H-pyrrolium hexachloroantimonate (BDMP) has been designed, synthesized and utilized to synthesize oligopeptides and biologically active peptides both in solution and solid phase with good yield, low racemization and fast reaction rate.
Initial use of 1-hydroxybenzotriazole in the chemistry of group 12 metals: An 1D zinc(II) coordination polymer and a mononuclear cadmium(II) complex containing the deprotonated ligand in a novel monodentate ligation mode
作者:Athanassios D. Katsenis、Nikolia Lalioti、Vlasoula Bekiari、Panagiotis Lianos、Catherine P. Raptopoulou、Aris Terzis、Spyros P. Perlepes、Giannis S. Papaefstathiou
DOI:10.1016/j.inoche.2008.11.010
日期:2009.2
Abstract The chemistry of 1-hydroxybenzotriazole (btaOH) with the group 12 metal ions Zn(II) and Cd(II) resulted in the 1D coordination polymer [Zn(btaO)2]n (1) and the mononuclear complex [Cd(btaO)2(H2O)4] · 3H2O (2 · 3H2O), respectively. Polymer 1 forms double-stranded chains which are further supported by weak C–H⋯O hydrogen bonds resulting in a pcu (primitive cubic) rod packing. The mononuclear
New and Highly Efficient Immonium Type Peptide Coupling Reagents: Synthesis, Mechanism and Application
作者:Peng Li、Jie-Cheng Xu
DOI:10.1016/s0040-4020(00)00365-3
日期:2000.6
A series of novel immonium type couplingreagents BOMI, BDMP, BPMP, DOMP, SOMP, FOMP and AOMP were designed and synthesized. It was shown that most of these reagents were more efficient in peptide synthesis than conventional methods due to the advantages of high reactivity, low racemization and good yields. The reaction mechanism was proposed and studied by 1H NMR, IR, UV and HPLC.
设计合成了一系列新型的铵型偶联剂BOMI,BDMP,BPMP,DOMP,SOMP,FOMP和AOMP。结果表明,由于具有高反应活性,低外消旋性和高收率的优势,大多数这些试剂在肽合成方面比常规方法更有效。提出了反应机理,并通过1 H NMR,IR,UV和HPLC进行了研究。
HOBt and HOAt-derived immonium salts: new and highly efficient coupling reagents for peptide synthesis
作者:Peng Li、Jie-Cheng Xu
DOI:10.1016/s0040-4039(99)02125-5
日期:2000.1
and HOAt-derived immonium type coupling reagents BDMP, BPMP and AOMP were shown to be very efficient for peptide synthesis with high reactivity, low racemization and good yields. X-Ray analysis indicates BOMI exists as the N-substituted form rather than as the O-substituted form assigned previously. A mechanism for amide bond formation mediated by these reagents was proposed and studied.
The X-ray structures of HOBt-based immonium-type coupling reagents and the rearrangement of benzotriazolyl esters of Nα-protected amino acids or peptides: N- vs. O-substituted forms †
作者:Peng Li、Jie Cheng Xu
DOI:10.1039/b003930f
日期:——
The crystal structures of HOBt-based immonium salts BOMI and BDMP are reported and show that these compounds crystallize as the N-substituted form rather than as the previously assigned O-substituted form. These unexpected phenomena are explained well by semiempirical PM3 calculations; the crystal structures of other HOBt-based onium salts can also be predicted by these theoretical calculations. The reaction mechanisms for coupling reactions mediated by these HOBt-based immonium salts and the rearrangement of the benzotriazolyl ester intermediate generated during the coupling reactions were studied by both experimental observations and theoretical calculations. The crystal structures of these benzotriazolyl esters were predicted by PM3 calculations and verified by reported X-ray data.
报告了 HOBt 基亚铵盐 BOMI 和 BDMP 的晶体结构,结果表明这些化合物以 N 取代形式结晶,而不是以前认为的 O 取代形式。半经验 PM3 计算很好地解释了这些意想不到的现象;这些理论计算还可以预测其他 HOBt 基鎓盐的晶体结构。通过实验观察和理论计算,研究了由这些 HOBt 基亚铵盐介导的偶联反应的反应机理以及偶联反应中生成的苯并三唑酯中间体的重排。通过 PM3 计算预测了这些苯并三唑酯的晶体结构,并通过报告的 X 射线数据进行了验证。