在一个300毫升三颈瓶中安装搅拌器、滴液漏斗和带氯化钙干燥管的冷凝器,并加入100毫升二氯甲烷。首先不进行搅拌,使用10毫升刻度吸管或量筒,每次约加1毫升,共分5次加入5.4毫升(0.20摩尔)90%过氧化氢。它与溶剂不会互溶地分层。瓶体用冰浴冷却后开始搅拌。在此冷溶液中,在至少20分钟内缓慢滴加34.0毫升(0.24摩尔)三氟乙酸酐。全部加入后,撤去冰浴,并在室温下再搅拌30分钟。
用途简介作为一种强氧化剂,它可以将芳伯胺氧化为硝基化合物、N-亚硝胺转化为N-硝基化合物、亏氧物质转化为硝基化合物、醛转化为腈、烯烃转化为反1,2-二醇、酮转化为酯,并能够生成2,6-二甲苯醌和2,6-二溴吡啶的N-氧化物。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
三氟乙酸 | trifluoroacetic acid | 76-05-1 | C2HF3O2 | 114.024 |
—— | (2,2,2-trifluoroacetyl)oxy 2,2,2-trifluoroethaneperoxoate | 684-80-0 | C4F6O5 | 242.031 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
三氟乙酸 | trifluoroacetic acid | 76-05-1 | C2HF3O2 | 114.024 |
—— | acetylperfluoroacetyl peroxide | —— | C4H3F3O4 | 172.061 |
—— | bis(trifluoroacetyl)peroxide | 383-73-3 | C4F6O4 | 226.032 |
—— | propionyltrifluoroacetyl peroxide | 477780-49-7 | C5H5F3O4 | 186.088 |
Several triglycerides were synthesized with an iodoaroyl group. Intramolecular radical chain transfer chlorinations were conducted that resulted in the associated pair of fatty acids of the triglyceride becoming chlorinated. The distribution of monochlorinated species was similar to that obtained by direct radical chlorination of the relevant fatty acid methyl esters. Functionalization was, as expected, away from the carboxylate group but gave no indication that either alignment of chains or the constraints of an intramolecular process could limit the manifold of products of the reaction. To gauge the effect on halogenation of a structure, bearing more than one electron‐withdrawing group, methyl oleate was converted to the