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M. Chagr, H. Fillion and A. Pougny, “A Regioselective Synthesis of 4,5- and 4,8-Disubstitutedazaanthraquinones by the Diels-Alder Route,” Tetrahedron Letters, Vol. 29, No. 46, 1988, pp. 5913-5916. doi:10.1016/S0040-4039(00)82224-8

has been cited by the following article:

• TITLE: Cycloaddition Reactions of Azatrienes with Sulfene

  AUTHORS: Parvesh Singh, Krishna Bisetty

  KEYWORDS: Azadiene; Azatriene; Cycloaddition; Sulfene; Thiazine-Dioxide

  JOURNAL NAME: International Journal of Organic Chemistry, Vol.2 No.2, June 27, 2012

  ABSTRACT: Unprecedented cycloaddition reactions of azatrienes (1) with sulfene leading to the synthesis of functionalized thiazinedioxide derivatives (5) are described. The reactions were found be highly regioselective resulting in the formation of only [4 + 2] cycloadducts.