straightforward and general way to synthesize various β-sulfonylamino sulfides with high regio- and diastereoselectivity. The developed method was coupled with intramolecular C–N coupling in a one-pot procedure to afford a series of dihydrobenzothiazine derivatives, a kind of important heterocycle used as biologically active compounds in medicinal chemistry.
Enantioselective desymmetrization of meso-aziridines with aromatic thiols catalyzed by chiral bifunctional quaternary phosphonium salts derived from α-amino acids
Desymmetrization of meso-aziridines with aromatic thiols was realized by using alpha-amino acids-derived chiral quaternary phosphonium salts catalysts to provide chiral beta-amino sulfides with high yields (up to 99%) and in moderate enantioselectivities (up to 70%). (C) 2015 Elsevier Ltd. All rights reserved.
An efficient copper-catalyzed synthesis of hexahydro-1H- phenothiazines
作者:D. J. C. Prasad、Govindasamy Sekar
DOI:10.1039/b916664e
日期:——
moieties can be synthesized by domino aziridine ring opening with o-halothiophenols followed by copper-catalyzed Goldberg coupling–cyclization with good to excellent yields. Less reactive o-chlorothiophenols are also successfully utilized for the dominoreaction to synthesize phenothiazine derivatives. This methodology is successfully applied in the synthesis of phenothiazine skeletons containing biologically