5669-05-6Relevant articles and documents
1,2-Benzisothiazole 1,1-Dioxide: a Convenient Synthesis. The Question of the Possible Aromaticity of 1,2-Benzothiazepine 1,1-Dioxides
Abramovitch, Rudolph A.,Mavunkel, Babu,Stowers, James R.
, p. 520 - 521 (1983)
A convenient synthesis of 1,2-benzisothiazole 1,1-dioxide from toluene-o-sulphonamide is reported, and this allows the preparation of a number of 1,2-benzothiazepine 1,1-dioxides bearing hydrogen atoms in the seven-membered ring; 1H n.m.r. spectroscopy suggests that the latter is not aromatic.
Copper (II)/RuPHOX-Catalyzed Enantioselective Mannich-Type Reaction of Glycine Schiff Bases with Cyclic Ketimines
Shao, Qihang,Wu, Liang,Chen, Jianzhong,Gridnev, Ilya D.,Yang, Guoqiang,Xie, Fang,Zhang, Wanbin
, p. 4625 - 4633 (2018/11/10)
A Cu(II)/RuPHOX-catalyzed enantioselective Mannich-type reaction of glycine Schiff bases with cyclic ketimines was developed, affording chiral α,?-diamino acid derivatives in good yields with moderate to good ee and dr values. This provides an efficient methodology for furnishing chiral Cβ-tetrasubstituted α,β-diamino acid precursors. The catalytic system is compatible with a series of substrates. In addition, an interesting nonlinear effect of the catalyst's enantiomeric composition on reaction enantioselectivity was observed. (Figure presented.).
Sulfonimines as bleach catalysts
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, (2008/06/13)
Novel bleach catalysts, a method for bleaching substrates using these catalysts and detergent compositions containing the catalysts are reported. The catalysts are sulfonimines. Substrates such as fabrics may be bleached in an aqueous solution containing