Gold-Catalyzed Intramolecular Cyclization of N-Propargylic β-Enaminones for the Synthesis of 1,4-Oxazepine Derivatives. 2015

Kommuru Goutham, and Desamala Ashok Kumar, and Surisetti Suresh, and Balasubramanian Sridhar, and Ravirala Narender, and Galla V Karunakar
Crop Protection Chemicals Division, ‡Academy of Scientific and Innovative Research, §Organic and Biomolecular Chemistry Division, and ∥Center for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India.

An efficient and mild one-pot, gold-catalyzed intramolecular cyclization of N-propargylic β-enaminones has been achieved for the generation of 1,4-oxazepine derivatives. This synthetic transformation tolerates a range of substituted N-propargylic β-enaminones in moderate to good yields.

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