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4-Nitrobenzene-1-sulfonyl bromide, also known as 4-nitrobenzenesulfonyl bromide or 4-nitrophenylsulfonyl bromide, is a chemical compound with the molecular formula C6H4BrNO4S. It is a yellow crystalline solid that is soluble in organic solvents such as ethanol and acetone. 4-nitrobenzene-1-sulfonyl bromide is an important reagent in organic synthesis, particularly in the preparation of sulfonamides and other sulfur-containing compounds. It is also used as a protecting group in peptide synthesis and as a reagent in the synthesis of various pharmaceuticals and agrochemicals. Due to its reactivity and potential hazards, it is important to handle 4-nitrobenzene-1-sulfonyl bromide with care, following proper safety protocols.

2297-66-7

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2297-66-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2297-66-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,2,9 and 7 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 2297-66:
(6*2)+(5*2)+(4*9)+(3*7)+(2*6)+(1*6)=97
97 % 10 = 7
So 2297-66-7 is a valid CAS Registry Number.

2297-66-7Relevant academic research and scientific papers

Facile synthesis of sulfonyl chlorides/bromides from sulfonyl hydrazides

Chen, Rongxiang,Xu, Shaohong,Shen, Fumin,Xu, Canran,Wang, Kaikai,Wang, Zhanyong,Liu, Lantao

, (2021/09/20)

A simple and rapid method for efficient synthesis of sulfonyl chlorides/bromides from sulfonyl hydrazide with NXS (X = Cl or Br) and late-stage conversion to several other functional groups was described. A variety of nucleophiles could be engaged in this transformation, thus permitting the synthesis of complex sulfonamides and sulfonates. In most cases, these reactions are highly selective, simple, and clean, affording products at excellent yields.

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