A simple convenient method for preparation of difluoromethyl ethers using fluorosulfonyldifluoroacetic acid as a difluorocarbene precursor
作者:Qing-Yun Chen、Sheng-Wen Wu
DOI:10.1016/s0022-1139(00)82808-0
日期:1989.9
In the presence of catalytic amounts of sodium sulfate or cuprous iodide, a variety of alkyl and aryl difluoromethyl ethers were synthesized in moderate yields by the reaction of the corresponding alcohols and phenols with fluorosulfonyldifluoroacetic acid (1) in acetonitrile under mild conditions. Fluorosulfonyldifluoroacetate anion [FO2SCF2OC2-] (5) is believed to readily eliminate SO2, CO2 and F-
在催化量的硫酸钠或碘化亚铜的存在下,通过使相应的醇和酚与氟磺酰基二氟乙酸(1)在乙腈中,温和的条件下反应,以中等收率合成了各种烷基和芳基二氟甲基醚。Fluorosulfonyldifluoroacetate阴离子[FO 2 SCF 2 OC 2 - ](5)被认为是容易消除SO 2,CO 2和F - ,从而解放CF 2:; 然后二氟卡宾的插入OH键和由氟离子它的捕获导致醚的形成和副产物CF 3分别H,。