Selective CS bond cleavage of a β-sultam ring was achieved by the reactions with Lewis acids. Aryl ketones or aldehyde were provided from 3-aryl-β-sultams whereas β-sultams bearing a poorly migratory substituent at C-3 gave trans-1,2,3-oxathiazolidine 2-oxides and/or cis-aziridines. These reactions were influenced by the cation-stabilizing capability of C-4 substituents and by the configuration of
Diverse Reactions of Sulfonyl Chlorides and Cyclic Imines
作者:Jing Liu、Shili Hou、Jiaxi Xu
DOI:10.1080/10426507.2011.608097
日期:2011.12.1
6-dihydro-4H-oxazines and thiazines, 4,5-dihydro-3H-benzo[c]azepine, and 3,4-dihydroisoquinoline, to produce diverse products instead of β-sultam derivatives. The results indicate that alkanesulfonyl chlorides react with cyclic imines to generate N-alkanesulfonyl cyclic iminium ions, which are attacked by nucleophiles, such as water and chloride anion, in the reaction systems, affording addition products
GRUNDER, EVELYNE;LECLERC, GERARD, SYNTHESIS,(1989) N, C. 135-137
作者:GRUNDER, EVELYNE、LECLERC, GERARD
DOI:——
日期:——
Synthesis of (±)-<i>erythro</i>- and (±)-<i>threo</i>-1,2-Diphenyltaurines by Diastereoselective Hydrolysis of Thiazetidine 1,1-Dioxides
作者:Evelyne Grunder、Gérard Leclerc
DOI:10.1055/s-1989-27176
日期:——
The disubstituted analogs of taurine, (±)-erythro- and (±)-threo-2-amino-1,2-diphenyl-ethanesulfonic acids were prepared from (±)-cis- and (±)-trans-2-benzyl-3,4-diphenyl-1,2-thiazetidine 1,1-dioxides, respectively, by diastereoselective hydrolysis of the sulfonamide bond, followed by N-debenzylation.