A direct and straightforward thiocyanation of enamides with NH4SCN under metal-free conditions has been accomplished. A variety of (E)-β-thiocyanoenamides are readily produced in a regio- and stereo-selective manner. The protocol features mild reaction conditions, good functional group tolerance and operational simplicity. The potential utility of this strategy was further demonstrated by transformation
在无
金属条件下,用NH 4 SCN对酰胺进行了直接,直接的
硫氰化反应。多种(E)-β-
硫氰基乙酰胺易于以区域和立体选择性的方式产生。该方案具有温和的反应条件,良好的官能团耐受性和操作简便性。通过将
硫氰酸盐转化为含
硫四唑的化合物,以及Pd催化的交叉偶联反应,得到六元或七元含
硫杂环,进一步证明了该策略的潜在效用。对反应的机械洞察表明,该反应可以通过自由基机理进行。