“…The salts of the lactim ether 24, formed with high yields by the action of gaseous hydrogen chloride (diethyl ether, 25) or hydrofluoroboric acid (methylene chloride, 5°C) on the corresponding lactim ethers, are converted by the action of water at room temperature into the salts of the esters of ω-amino carboxylic acids 25 [16,17]. The reaction of valerolactim methyl ether with methyl fluorosulfonate (9) gives an 80% yield of the fluorosulfate 26 [24,39] …”