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Benzolsulfinsaeurefluorid, also known as benzenesulfinyl fluoride or phenylmethylsulfinyl fluoride, is a chemical compound with the formula C6H5SO2F. It is a colorless, crystalline solid that is soluble in organic solvents. Benzolsulfinsaeurefluorid is an important reagent in organic synthesis, particularly in the preparation of chiral sulfoxides and sulfones, which are valuable intermediates in the synthesis of various pharmaceuticals and agrochemicals. Benzenesulfinyl fluoride is also used as a protecting group in peptide synthesis and as a chiral auxiliary in asymmetric reactions. Due to its reactivity and potential toxicity, it should be handled with care in a laboratory setting.

657-98-7

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657-98-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 657-98-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,5 and 7 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 657-98:
(5*6)+(4*5)+(3*7)+(2*9)+(1*8)=97
97 % 10 = 7
So 657-98-7 is a valid CAS Registry Number.

657-98-7Relevant academic research and scientific papers

Arylsulfur(VI) Trifluoride Oxides by F2-Addition to Sulfinic Fluorides

Ruppert Ingo

, p. 1047 - 1052 (2007/10/02)

The hitherto unknown compounds of the type: arylsulfur(VI) trifluoride oxides (2a: Ar = Ph; 2b: Ar = p-FC6H4) are obtained by direct F2-addition to the sulfinic fluorides 1a and b.The fixed trigonal-bipyramidal ligand arrangement is documented by 19F and 13C1H NMR data.In glass vessels, 2a, b readily undergo decomposition catalyzed by HF to give the corresponding sulfonic fluorides 3a, b.Action of BF3 on 2a by abstraction of fluoride yields the difluorophenylsulfoxonium salt 4a, that on dry distillation with NaF re-liberates 2a.

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