Oxidation of Difluorocarbene by Pyridine <scp><i>N</i>‐Oxide</scp> and Ensuing Access to Carbamoyl Fluorides<sup>†</sup>
作者:Hai‐Jun Tang、Xue‐Min Shi、Xiao‐Yu Zhu、Cheng‐Qiang Wang、Chao Feng
DOI:10.1002/cjoc.202300316
日期:2023.11.15
practical one-pot preparation of carbamoyl fluorides from easily obtained pyridine N-oxide, commercially available secondary amines and synthetically versatile difluorocarbene precursors (Ruppert-Prakash reagent or Chen's reagent) was developed herein, which dexterously resorted to the oxidation of difluorocarbene by external pyridine N-oxide to produce the toxic and gaseous fluorophosgene in situ. Notable
本文开发了一种实用的一锅法,由容易获得的吡啶N-氧化物、市售仲胺和合成通用的二氟卡宾前体(鲁珀特-普拉卡什试剂或陈氏试剂)制备氨基甲酰氟,该方法巧妙地利用外部吡啶氧化二氟卡宾N-氧化物原位产生有毒的气态氟光气。该方法的显着特点包括良好的功能耐受性、药物分子的后期修饰以及喹啉的回收和再循环。