An iron-catalyzed aerobic oxidation of (alkyl)(aryl)azinylmethanes has been developed leading to tertiary alcohols in moderate to good yields. Hock rearrangement was identified as a major side reaction leading to a complex mixture of undesired products. Addition of thiourea sometimes allows inhibiting this side reaction and steers the reaction towards the desired products.
Photoinduced Radical Desulfurative C(sp<sup>3</sup>)–C(sp<sup>2</sup>) Coupling via Electron Donor–Acceptor Complexes
作者:Jiaxuan Shen、Jincan Li、Meijun Chen、Xuerong Yue、Xin Shi
DOI:10.1021/acs.orglett.4c00162
日期:2024.2.23
Herein, we disclose a radical desulfurative C–C coupling protocol for the synthesis of 4-alkylpyridines. A variety of substituents on both benzyl thiols and 4-cyanopyridines are tolerated. The reaction is carried out under mild and photocatalyst- and transition-metal-free conditions. Preliminary mechanistic studies show that an electron donor–acceptor complex is formed between benzyl thiols and 4-cyanopyridines