title: Thionation of Tryptanthrin, Rutaecarpine, and Related Molecules with a Reagent Prepared from P4S10 and Pyridine.
abstract: Reaction of P4S10 in hot pyridine produces a crystalline solid which can be collected and used for thionations in other solvents such as acetonitrile and sulfolane. The biologically active natural products tryptanthrine, rutaecarpine, 7,8-dehydrorutaecarpine, and some related compounds have now been converted to thionated versions simply by heating the molecules with this thionating reagent in sulfolane (typically at 135 °C for 20 min) followed by a workup in water. No chromatography was necessary.
authors.affiliation: Department of Biosciences, Karolinska Institute, Novum , SE-141 57 Huddinge, Sweden.|Vironova Medical , SE-113 30 Stockholm, Sweden.
authors.forename: Ngarita
authors.initials: N
authors.lastname: Kingi
authors.affiliation: Department of Biosciences, Karolinska Institute, Novum , SE-141 57 Huddinge, Sweden.|Vironova Medical , SE-113 30 Stockholm, Sweden.
authors.forename: Jan
authors.initials: J
authors.lastname: Bergman