Abstract
AbstractAn efficient synthetic protocol for functionalized 2‐oxaspiro[bicyclo[2.2.1]heptane‐2,3′‐indolines] was successfully developed by one‐pot two‐step reaction of phenacyl bromides, malononitrile and 3‐methyleneoxindolines in ethanol in the presence of triethylamine. On the other hand, the similar three‐component reaction of phenacyl bromides, ethyl cyanoacetate and 3‐methyleneoxindolines afforded functionalized spiro[cyclopentane‐1,3′‐indoline] derivatives.
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