A facilesynthesis of indole annulated 2H-thiopyran-2-ones has been developed by condensation of indoline-2-thiones with acetoacetic esters in the presence of borontrifluoride etherate (BF3 etherate) using microwave irradiation. This one-step operationally simple methodology leads to thiopyrano[2,3-b]indol-2-ones in good yields.
在微波辐射下,在三氟化硼醚化物(BF 3醚化物)存在下,吲哚啉-2-硫酮与乙酰乙酸酯的缩合反应已开发出吲哚环状的2 H-硫吡喃-2-酮的简便合成方法。这种一步操作简单的方法可以得到高产率的噻喃并[2,3 - b ]吲哚-2-酮。