6326-37-0Relevant academic research and scientific papers
Convenient and environment-friendly synthesis of sulfonyl chlorides from S -alkylisothiourea salts via N-chlorosuccinimide chlorosulfonation
Yang, Zhanhui,Xu, Jiaxi
, p. 1675 - 1682 (2013/07/27)
A convenient, practical, and environmentally friendly method for the synthesis of sulfonyl chlorides has been developed. Structurally diverse sulfonyl chlorides were synthesized in moderate to excellent yields from S-alkylisothiourea salts, which can be easily prepared from readily accessible alkyl halides or mesylates and inexpensive thiourea, via N-chlorosuccinimide chlorosulfonation. In large-scale syntheses, the byproduct succinimide from 'waste water' can be conveniently converted into the starting reagent N-chlorosuccinimide with sodium hypochlorite (bleach) to make the method sustainable. Georg Thieme Verlag Stuttgart, New York.
Organic-Soluble Lanthanide Nuclear Magnetic Resonance Shift Reagents for Sulfonium and Isothiuronium Salts
Wenzel, Thomas J.,Zaia, Joseph
, p. 562 - 567 (2007/10/02)
Lanthanide complexes of the formula 4>- (fod, 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione) are effective organic-soluble nuclear magnetic resonance shift reagents for sulfonium and isothiuronium salts.The shift reagent is formed in solution from Ln(fod)3 and Ag(fod) or K(fod).The selection of Ag(fod) or K(fod) in forming the shift reagent is dependent on the anion of the organic salt.Ag(fod) is more effective with halide salts, whereas K(fod) is preferred with tetrafluoroborate salts.Resolution of diastereotopic hydrogen atoms was observed in the shifted spectra of certain substrates.Enantiomeric resolution was obtained in the spectrum of sec-butylisothiuronium chloride with a chiral shift reagent.The reagents can be employed in solvents such as chloroform and benzene.
