A new method for the nitrative spirocyclization of alkynes is described. This method involves the oxidative difunctionalization of alkynes initiated by a radical attack pathway using t‐ BuONO ( tert ‐butyl nitrite) combined with water as the nitro source and TEMPO [(2,2,6,6‐tetramethyl‐piperidin‐1‐yl)oxyl] as the initiator, and it represents a new example of oxidative alkyne difunctionalization via the formation of CN/CC bonds for the assembly of nitroalkene unit‐containing spirocycles. magnified image
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Yang et al. (2015) studied this question.
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