N-(Cyclohex-1-enyl)-α-(methylthio)acetamides 1, upon treatment with Mn(OAc)3 in the presence of Cu(OAc)2, underwent cyclization in a 5-endo-trig manner to give 1,4,5,6-tetrahydro-3-methylthio-2H-indol-2-ones 2. The radical mechanism has been proposed for the cyclization of 1.
N-(
环己-1-烯基)-α-(甲
硫基)乙酰胺1在Cu(OAc)2存在下与Mn(OAc)3反应,以5-内型三通方式发生环化反应,生成1,4,5,6-四氢-3-甲
硫基-
2H-吲哚-2-酮2。有人提出1的环化反应是自由基机理。