- Improved synthesis of the bifunctional chelator p-SCN-Bn-HOPO
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The bifunctional ligand p-SCN-Bn-HOPO, which has four 1,2-hydroxypyridinone groups on a spermine backbone with an isothiocyanate linker, has been shown to be an efficient and stable chelator for Zr(iv) and, more importantly, the radioisotope 89Zr for use in radiolabeling antibodies for positron emission tomography (PET) imaging. Previous studies of 89Zr-HOPO-trastuzumab in mice showed low background, good tumor to organ contrast, and very low bone uptake which show p-SCN-Bn-HOPO to be an important next-generation bifunctional chelator for radioimmunoPET imaging with 89Zr. However, the reported synthesis of p-SCN-Bn-HOPO involves nine steps and multiple HPLC purifications with an overall yield of about 1.4%. Herein we report an improved and efficient synthesis of p-SCN-Bn-HOPO in four steps with 14.3% overall yield which will improve its availability for further biological studies and wider application in PET imaging. The new synthetic route also allows variation in linker length and chemistries which may be helpful in modifying in vivo clearance behaviors of future agents.
- Bhupathiraju, N.V.S. Dinesh K.,Younes, Ali,Cao, Minhua,Ali, Jafar,Cicek, Huseyin T.,Tully, Kathryn M.,Ponnala, Shashikanth,Babich, John W.,Deri, Melissa A.,Lewis, Jason S.,Francesconi, Lynn C.,Drain, Charles Michael
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supporting information
p. 6866 - 6871
(2019/07/22)
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- Opioid ligands with mixed properties from substituted enantiomeric N-phenethyl-5-phenylmorphans. Synthesis of a -agonist δ-antagonist and δ-inverse agonists
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Enantiomeric N-phenethyl-m-hydroxyphenylmorphans with various substituents in the ortho, meta or para positions of the aromatic ring in the phenethylamine side-chain (chloro, hydroxy, methoxy, nitro, methyl), as well as a pyridylethyl and a indolylethyl m
- Cheng, Kejun,Kim, In Jong,Lee, Mei-Jing,Adah, Steven A.,Raymond, Tyler J.,Bilsky, Edward J.,Aceto, Mario D.,May, Everette L.,Harris, Louis S.,Coop, Andrew,Dersch, Christina M.,Rothman, Richard B.,Jacobson, Arthur E.,Rice, Kenner C.
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p. 1177 - 1190
(2008/02/04)
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- COMPOUNDS
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A compound of formula (I): compositions and medicaments containing the same as well as processes for the preparation and use of such compounds, compositions and medicaments, particularly in diseases associated with inappropriate Aurora activity.
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Page/Page column 63-64
(2010/11/26)
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- PHENYLALKYL AND PYRIDYLALKYL PIPERAZINE DERIVATIVES
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This invention relates to compounds of the formula (1) wherein R1, R3, R4, X1, and X2 are defined as in the specification, pharmaceutical compositions containing them and their use in the treatment of central nervous system and other disorders.
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