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Synfacts 2010(10): 1123-1123
DOI: 10.1055/s-0030-1258612
DOI: 10.1055/s-0030-1258612
Synthesis of Heterocycles
© Georg Thieme Verlag
Stuttgart ˙ New York
Molybdenum Complex Catalyzed Reductive Cyclization of ω-Nitro Alkenes
C. C. Malakar, E. Merisor, J. Conrad, U. Beifuss*
Universität Hohenheim, Stuttgart, Germany
Weitere Informationen
Publikationsverlauf
Publikationsdatum:
22. September 2010 (online)
Significance
Reported is the reductive cyclization of ω-nitro alkenes to dihydro benzothiazines, benzoxazines and quinolines using triphenylphosphine as the reductant and a molybdenum complex as the catalyst. The reaction is proposed to proceed through an ‘Alder-ene’ mechanism, which is supported by the absence of reaction in the case of terminal alkenes for which no ene reaction is possible.