Multifunctional Crown-5-calix[4]arene-based Phase-Transfer Catalysts for Aromatic <sup>18</sup>F-Fluorination
作者:Won Chang Lee、Seok Min Kang、Byung Chul Lee、Sang Eun Kim、Dong Wook Kim
DOI:10.1021/acs.orglett.0c03604
日期:2020.12.18
Methylated bis-triethylene glycolic crown-5-calix[4]arene (M-BTC5A) as a phase-transfer catalyst showed the best performance among other analogues and even conventional Kryptofix 222 in the nucleophilic aromatic 18F-fluorination of diaryliodonium tosylate precursors owing to (i) the efficient release of reactive “naked” [18F]fluoride, (ii) the high stabilization of the precursor in the reaction, and, presumably
甲基化的双三乙二醇冠-5杯芳烃[4]芳烃(M-BTC5A)作为相转移催化剂,在甲苯磺酸二芳基碘鎓前体的亲核芳族18 F氟化反应中,在其他类似物甚至常规Kryptofix 222中表现出最佳性能(i)有效释放反应性“裸” [ 18 F]氟化物,(ii)反应中前体的高度稳定,以及(iii)前体与K 18 F之间的接触容易/ M-BTC5A复合体通过π-π相互作用促进。使用M-BTC5A以高放射化学收率生产了[ 18 F]氟马西尼。