Add time:09/24/2019 Source:sciencedirect.com
A short entry to 3a-(o-nitrophenyl)octahydroindol-4-ones employing ozonolysis and double reductive amination of 2-allyl-2-(o-nitrophenyl)-1,3-cyclohexanedione (9) is described. The symmetric dione 9 is synthesized in a 50% overall yield from 1,3-cyclohexanedione by means of o-nitroarylation followed by O-allylation and subsequent Claisen rearrangement. Configurational and conformational aspects of azabicyclic derivatives 1 (a-k) are discussed.
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