Syntheses, structures, and stabilities of aliphatic and aromatic fluorous iodine(I) and iodine(III) compounds: the role of iodine Lewis basicity
作者:Tathagata Mukherjee、Soumik Biswas、Andreas Ehnbom、Subrata K Ghosh、Ibrahim El-Zoghbi、Nattamai Bhuvanesh、Hassan S Bazzi、John A Gladysz
DOI:10.3762/bjoc.13.246
日期:——
4-(Rf8CH2CH2)2C6H3I (77-93%). The former, the crystal structure of which is determined, reacts with Cl2 to give a 75:25 ArICl2/ArI mixture, but partial Cl2 evolution occurs upon work-up. The latter gives the easily isolated dichloride 1,2,4-(Rf8CH2CH2)2C6H3ICl2 (89%). The relative thermodynamic ease of dichlorination of these and other iodine(I) compounds is probed by DFT calculations.
寻找与各种合成应用相关的标题分子。脂肪族氟醇 Rfn CH2OH (Rfn = CF3(CF2) n-1; n = 11, 13, 15) 转化为三氟甲磺酸酯 Rfn CH2OTf (Tf2O, 吡啶; 22-61%),然后转化为 Rfn CH2I (NaI,丙酮;58-69%)。随后与 NaOCl/HCl 反应生成二氯化碘 (III) Rfn CH2ICl2 (n = 11, 13; 33-81%),缓慢放出 Cl2。醚类氟醇 CF3CF2CF2O(CF(CF3)CF2O) x CF(CF3)CH2OH (x = 2-5) 类似地转化为三氟甲磺酸酯,然后转化为碘化物,但生成相应二氯化物的努力失败。缺少亚甲基基团 Rfn I 的底物也是惰性的,但将 TMSCl 添加到双(三氟乙酸酯)Rfn I(OCOCF3)2 似乎会生成 Rfn ICl2,从而快速释放 Cl2。芳香族氟碘化物 1,3-Rf6C6H4I、1