Double C–N bond cleavages of <i>N</i>-alkyl 4-oxopiperidinium salts: access to unsymmetrical tertiary sulfonamides
作者:Ying Fu、Ming-Peng Li、Chun-Zhao Shi、Fang-Rong Li、Zhengyin Du、Congde Huo
DOI:10.1039/c9ob02107h
日期:——
paper, regiospecific, double intraannular C–N bond cleavages of N-alkyl 4-oxopiperidinium salts are presented. The reaction sequence involves a charge-transfer complex, in situ formed between sulfonyl chloride and N-methylmorpholine, which induces S–Cl bond homolysis of sulfonyl chloride, yielding a reactive sulfonyl radical that further induces the double C–N bond cleavages of N-alkyl 4-oxopiperidinium