Iron-Induced Regio- and Stereoselective Addition of Sulfenyl Chlorides to Alkynes by a Radical Pathway
作者:Masayuki Iwasaki、Tomoya Fujii、Kiyohiko Nakajima、Yasushi Nishihara
DOI:10.1002/anie.201408121
日期:2014.12.8
tetrasubstituted alkynes. Preliminary mechanistic investigations revealed a plausible radical process involving a sulfur‐centered radical intermediate via iron‐mediated homolysis of the ClS bond. The resulting chlorothiolation adducts can be readily transformed to the structurally complex alkenyl sulfides by cross‐coupling reactions. The present reaction can also be applied to the complementary synthesis of the
自由基加成的氯的小号σ键在亚磺酰基氯化物,以各种C语言 C三键已在共同的铁盐催化量的存在具有优良的区域选择性和立体选择性获得。该反应可与多种官能团兼容,并且可以按比例放大至克级,而不会降低收率。除末端炔烃外,内部炔烃也进行立体定义的氯硫醇化反应以提供四取代的炔烃。初步机械调查显示涉及一个合理的自由基法硫为中心通过在CL的铁介导的均裂自由基中间体S键。产生的氯硫代加合物可以通过交叉偶联反应轻松转化为结构复杂的烯基硫化物。本反应还可以用于过渡金属催化反应的潜在有用的双亚砜配体的互补合成。