Abstract

AbstractWittig reagents (1a–c) react with N‐(phenylsulfonyl)‐1,4‐benzoquinone monoimine 2a to give adducts 3a, 4a, and 4b. On the other hand, the reactions of 2b with the same ylides (1a–c) yield the new products 3b, 6a, and 6b, respectively. Mechanisms accounting for the formation of the new products are discussed and the probable structures of the products are presented, based on compatible analytical and spectral data.

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