Synthesis of 11C-labeled Kendine 91, a histone deacetylase inhibitor

In the present paper, the synthesis of 11C-labeled Kendine 91 (a HDAC inhibitor which has shown in vitro and in vivo activity in HCT 116 and MOLT 4 human cancer cell lines) is described for the first time. The radiosynthesis has been approached by reaction of the non-radioactive precursor 6-((3-(4-h...

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Published in:Applied radiation and isotopes Vol. 70; no. 10; pp. 2552 - 2557
Main Authors: Aginagalde, Maialen, Gómez-Vallejo, Vanessa, Vara, Yosu, Cossío, Fernando P., Llop, Jordi
Format: Journal Article
Language:English
Published: England Elsevier Ltd 01-10-2012
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Abstract In the present paper, the synthesis of 11C-labeled Kendine 91 (a HDAC inhibitor which has shown in vitro and in vivo activity in HCT 116 and MOLT 4 human cancer cell lines) is described for the first time. The radiosynthesis has been approached by reaction of the non-radioactive precursor 6-((3-(4-hydroxyphenyl)-5-phenyl-1H-pyrrole-2-carboxamide))hexanehydroxamic acid with [11C]CH3I in basic media. Despite the presence of more than one reactive site in the chemical structure of the precursor, acceptable radiochemical yield (8.2±2.1%, decay corrected to the end of bombardment), specific activity (28.2±9.4GBq/μmol) and radiochemical purity values (>95%) were obtained in reasonably short preparation times (∼40min). Despite the moderate radiochemical yield, final radioactivity and radioactivity concentration values (1.8±0.3GBq and 180MBq/ml, respectively) should be sufficient for putative in vivo studies in animals. ► We labeled Kendine 91 with carbon-11. ► Despite low yields final radioactivity should allow in vivo studies. ► We synthesized the desmethylated precursor using two routes. ► Microwave assisted Paal–Knorr reaction was more efficient than (3+2) cycloaddition.
AbstractList In the present paper, the synthesis of 11C-labeled Kendine 91 (a HDAC inhibitor which has shown in vitro and in vivo activity in HCT 116 and MOLT 4 human cancer cell lines) is described for the first time. The radiosynthesis has been approached by reaction of the non-radioactive precursor 6-((3-(4-hydroxyphenyl)-5-phenyl-1H-pyrrole-2-carboxamide))hexanehydroxamic acid with [11C]CH3I in basic media. Despite the presence of more than one reactive site in the chemical structure of the precursor, acceptable radiochemical yield (8.2±2.1%, decay corrected to the end of bombardment), specific activity (28.2±9.4GBq/μmol) and radiochemical purity values (>95%) were obtained in reasonably short preparation times (∼40min). Despite the moderate radiochemical yield, final radioactivity and radioactivity concentration values (1.8±0.3GBq and 180MBq/ml, respectively) should be sufficient for putative in vivo studies in animals. ► We labeled Kendine 91 with carbon-11. ► Despite low yields final radioactivity should allow in vivo studies. ► We synthesized the desmethylated precursor using two routes. ► Microwave assisted Paal–Knorr reaction was more efficient than (3+2) cycloaddition.
In the present paper, the synthesis of (11)C-labeled Kendine 91 (a HDAC inhibitor which has shown in vitro and in vivo activity in HCT 116 and MOLT 4 human cancer cell lines) is described for the first time. The radiosynthesis has been approached by reaction of the non-radioactive precursor 6-((3-(4-hydroxyphenyl)-5-phenyl-1H-pyrrole-2-carboxamide))hexanehydroxamic acid with [(11)C]CH(3)I in basic media. Despite the presence of more than one reactive site in the chemical structure of the precursor, acceptable radiochemical yield (8.2±2.1%, decay corrected to the end of bombardment), specific activity (28.2±9.4 GBq/μmol) and radiochemical purity values (>95%) were obtained in reasonably short preparation times (~40 min). Despite the moderate radiochemical yield, final radioactivity and radioactivity concentration values (1.8±0.3 GBq and 180 MBq/ml, respectively) should be sufficient for putative in vivo studies in animals.
In the present paper, the synthesis of (11)C-labeled Kendine 91 (a HDAC inhibitor which has shown in vitro and in vivo activity in HCT 116 and MOLT 4 human cancer cell lines) is described for the first time. The radiosynthesis has been approached by reaction of the non-radioactive precursor 6-((3-(4-hydroxyphenyl)-5-phenyl-1H-pyrrole-2-carboxamide))hexanehydroxamic acid with [(11)C]CH(3)I in basic media. Despite the presence of more than one reactive site in the chemical structure of the precursor, acceptable radiochemical yield (8.2±2.1%, decay corrected to the end of bombardment), specific activity (28.2±9.4 GBq/μmol) and radiochemical purity values (>95%) were obtained in reasonably short preparation times (~40 min). Despite the moderate radiochemical yield, final radioactivity and radioactivity concentration values (1.8±0.3 GBq and 180 MBq/ml, respectively) should be sufficient for putative in vivo studies in animals.
In the present paper, the synthesis of 11C-labeled Kendine 91 (a HDAC inhibitor which has shown in vitro and in vivo activity in HCT 116 and MOLT 4 human cancer cell lines) is described for the first time. The radiosynthesis has been approached by reaction of the non-radioactive precursor 6-((3-(4-hydroxyphenyl)-5-phenyl-1H-pyrrole-2-carboxamide))hexaneh y droxamic acid with [11C]CH3I in basic media. Despite the presence of more than one reactive site in the chemical structure of the precursor, acceptable radiochemical yield (8.2+/-2.1%, decay corrected to the end of bombardment), specific activity (28.2+/-9.4 GBq/Ammol) and radiochemical purity values (>95%) were obtained in reasonably short preparation times ( similar to 40 min). Despite the moderate radiochemical yield, final radioactivity and radioactivity concentration values (1.8+/-0.3 GBq and 180 MBq/ml, respectively) should be sufficient for putative in vivo studies in animals.
Author Aginagalde, Maialen
Vara, Yosu
Gómez-Vallejo, Vanessa
Llop, Jordi
Cossío, Fernando P.
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Keywords HDAC inhibitors
Carbon-11
Kendine 91
PET
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Snippet In the present paper, the synthesis of 11C-labeled Kendine 91 (a HDAC inhibitor which has shown in vitro and in vivo activity in HCT 116 and MOLT 4 human...
In the present paper, the synthesis of (11)C-labeled Kendine 91 (a HDAC inhibitor which has shown in vitro and in vivo activity in HCT 116 and MOLT 4 human...
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SubjectTerms Carbon Radioisotopes - chemistry
Carbon-11
Chromatography, Liquid
HDAC inhibitors
Histone Deacetylase Inhibitors - chemical synthesis
Hydroxamic Acids - chemical synthesis
Kendine 91
Magnetic Resonance Spectroscopy
PET
Pyrroles - chemical synthesis
Title Synthesis of 11C-labeled Kendine 91, a histone deacetylase inhibitor
URI https://dx.doi.org/10.1016/j.apradiso.2012.05.016
https://www.ncbi.nlm.nih.gov/pubmed/22871301
https://search.proquest.com/docview/1035531459
https://search.proquest.com/docview/1069201532
Volume 70
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