Iron-Catalyzed Decarboxylation of Trifluoroacetate and Its Application to the Synthesis of Trifluoromethyl Thioethers
作者:Benjamin Exner、Bilguun Bayarmagnai、Fan Jia、Lukas J. Goossen
DOI:10.1002/chem.201503915
日期:2015.11.23
Nucleophilic CF3 has been generated by decarboxylation of potassium trifluoroacetate, arguably the most easy‐to‐handle, inexpensive, and sustainable source of trifluoromethyl groups. Simple iron(II) chloride catalyzes the decarboxylation as well as a subsequent trifluoromethylation of organothiocyanates, resulting in a straightforward synthesis of trifluoromethyl thioethers. The KCN byproduct is absorbed by
亲核CF 3是由三氟乙酸钾脱羧生成的,而三氟乙酸钾可以说是最易于处理,廉价且可持续的三氟甲基来源。简单的氯化铁(II)催化有机硫氰酸酯的脱羧以及随后的三氟甲基化,从而直接合成三氟甲基硫醚。KCN副产物被铁(II)吸收,形成了无毒的六氰合铁酸钾。醛与三氟乙酸酯的类似三氟甲基化反应强调了这种铁催化的脱羧三氟甲基化反应的合成潜力。