Radiofluorination of diaryliodonium tosylates under aqueous-organic and cryptand-free conditions.
Radiofluorination of diaryliodonium tosylates under aqueous-organic and cryptand-free conditions.
复制标题
DOI:
10.1039/c3ob40742j
复制
发表时间:
2013-08-21
影响因子:
3.2
通讯作者:
Pike VW
中科院分区:
文献类型:
--
作者:
Chun JH;Telu S;Lu S;Pike VW
Positron emission tomography (PET) has growing importance as a molecular imaging technique for clinical research and drug development. Methods for producing PET radiotracers utilizing cyclotron-produced [18F]fluoride ion (t1/2 = 109.7 min) without the need for complete removal of irradiated target [18O]water and addition of cryptand are keenly sought for practical convenience and efficiency. Several structurally diverse diaryliodonium tosylates, XArI+Ar′Y TsO− (X = H or p-MeO), were investigated in a microfluidic apparatus for their reactivity towards radiofluorination with high specific activity (no-carrier-added) [18F]fluoride ion in mixtures of DMF and irradiated target [18O]water in the absence of cryptand. Salts bearing a para or ortho electron-withdrawing group Y (e.g., Y = p-CN) reacted rapidly (~ 3 min) to give the expected major [18F]fluoroarene product, [18F]ArY, in useful moderate radiochemical yields even when the solvent had [18O]water content up to 28%. Salts bearing electron-withdrawing groups in meta position (e.g., Y = m-NO2), or an electron-donating substituent (Y = p-OMe), gave low radiochemical yields under the same conditions.
登录
查看更多内容
影响因子:
13.8
作者:
Pike VW
通讯作者:
Pike VW
影响因子:
4.9
作者:
Martín-Santamaría, S;Carroll, MA;Widdowson, DA
通讯作者:
Widdowson, DA
影响因子:
3.6
作者:
LANDINI, D;MAIA, A;RAMPOLDI, A
通讯作者:
RAMPOLDI, A
影响因子:
3.3
作者:
Pliego, Josefredo R., Jr.;Pilo-Veloso, Dorila
通讯作者:
Pilo-Veloso, Dorila
影响因子:
2.8
作者:
Chun, Joong-Hyun;Lu, Shuiyu;Pike, Victor W.
通讯作者:
Pike, Victor W.