Heptadecafluorooctanesulfonic acid (C8F17SO3H) catalyzed intramolecular hydroamination of olefinic sulfonamides in fluorous biphase system (FBS)
摘要:
A practical, efficient, and environmentally benign intramolecular hydroamination of olefinic sulfonamides was carried out in fluorous biphase system (FBS) using commercially available heptadecafluorooctanesulfonic acid (C8F17SO3H) as a catalyst and perfluorodecaline (C10F18, cis- and trans- mixture) as a fluorous solvent to produce the corresponding cyclic products in good yields. The Bronsted acid of C8F17SO3H is easily recovered and recycled at least five times. (c) 2006 Elsevier B.V. All rights reserved.
Copper(II) Acetate Promoted Oxidative Cyclization of Arylsulfonyl-o-allylanilines
摘要:
Tosyl-o-allylaniline 1 undergoes oxidative cyclization to produce tetracycle 2 upon treatment with Cu(OAc)(2) and Cs2CO3 at 120 degreesC. The scope of the reaction was extended to other N-sulfonylated aromatic systems.