mixture of the corresponding mono-Pummerer product 2, the bis-Pummerer product 3, and the bis-sulfide 4 in an n:1:1 ratio (n >/= 2). The 1:1 formation of 3 and 4 indicates an intermolecular interaction between sulfur atoms. The reaction with the deuterium-labeled 1-d(3)() showed that the formation of 2 occurs at the sulfenyl as well as sulfinyl groups in 1a-d(3)()-1d-d(3)(), in which the product ratio
描述了对-双(甲
硫基)-芳族化合物1的单亚砜的远程Pummerer反应。1与(CF(3)CO)(2)O在CH(2)Cl(2)中的反应产生相应的单-Pummerer产物2,双-Pummerer产物3和双
硫化物4的混合物以n:1:1的比例(n> / = 2)。3和4的1:1形成表明
硫原子之间存在分子间相互作用。与
氘标记的1-d(3)()的反应表明2的形成发生在1a-d(3)()-1d-d(3)()中的亚磺酰基和亚磺酰基上2-d(3)():2-d(2)()的乘积比在3.5-10之间。另一方面,优选以通常的方式在亚磺酰基上发生1e-d(3)()的Pummerer反应。双
硫化物4和双亚砜5的1:1混合物与(CF(3)CO)(2)O的反应也得到2,3,