Facile Access to Bicyclic Sultams with Methyl 1-Sulfonylcyclopropane-1-carboxylate Moieties
作者:Valentin A. Rassadin、Aleksandr A. Tomashevskiy、Viktor V. Sokolov、Arne Ringe、Jörg Magull、Armin de Meijere
DOI:10.1002/ejoc.200900113
日期:2009.6
4-dibromobutyl)(methoxycarbonyl)methanesulfanilides upon treatment with potassium carbonate in DMF furnish methyl 3-aryl-2,2-dioxo-2-thia-3-azabicyclo[n.1.0]alkane-1-carboxylates in yields ranging from 54 to 84 % (10 examples). The starting materials were obtained by sulfonylation of N-alkenylanilines with methyl (chlorosulfonyl)acetate and subsequent bromination. For the N-alkenylanilines (10 examples, 60–77 %
Bicyclic Sultams with a Nitrogen at the Bridgehead and a Sulfur Atom in the Apex Position: Facile Preparation and Conformational Properties
作者:Valentin A. Rassadin、Daria S. Grosheva、Aleksandr A. Tomashevskiy、Viktor V. Sokolov、Dmitry S. Yufit、Sergei I. Kozhushkov、Armin de Meijere
DOI:10.1002/ejoc.201000345
日期:——
A practical synthesis of bicyclic sultams with a pyramidal bridgehead nitrogen atom and a sulfur atom in the apex position has been elaborated. Compounds with 1-azathiabicyclo[2.2.1]heptane (12a), -bicyclo[3.2.1]octane (12b, 12d), and -bicyclo[3.3.1]nonane (13b) skeletons were obtained by direct twofold inter/intramolecular alkylation of corresponding monocyclic sultams 9 and 10 with α,ω-dihalides