Di-<i>tert</i>-butyl Peroxide-Mediated Radical C(sp<sup>2</sup>/sp<sup>3</sup>)–S Bond Cleavage and Group-Transfer Cyclization
作者:Kai Luo、Wen-Chao Yang、Kai Wei、Yue Liu、Jun-Ke Wang、Lei Wu
DOI:10.1021/acs.orglett.9b02837
日期:2019.10.4
cascade radical C(sp2/sp3)-S bond cleavage and group-transfer cyclization is disclosed. Triggered by alkyl radicals, varieties of 2-isocyanoaryl thioethers containing aliphatic, aryl, and heteroaromatic groups can be cleaved and precisely reinstalled to give benzothiazole derivatives. Mechanistic studies reveal that the cascade reaction undertakes an intermolecular pathway, and the inner radical sources
公开了一种级联自由基C(sp2 / sp3)-S键裂解和基团转移环化的新策略。由烷基引发,含有脂肪族,芳基和杂芳族基团的2-异氰基芳基硫醚可以被裂解并精确地重新安装,得到苯并噻唑衍生物。机理研究表明,级联反应采用分子间途径,并且内部自由基源(R自由基)比源自二叔丁基过氧化物的甲基自由基具有更高的优先级。