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Benzenesulfinic acid and benzenesulfonic acid are two distinct chemical compounds derived from benzene. Benzenesulfinic acid (C6H5SO2H) is an organosulfur compound with a sulfinyl group (-SO2H) attached to the benzene ring, while benzenesulfonic acid (C6H5SO3H) has a sulfonic acid group (-SO3H) attached to the benzene ring. These compounds are widely used in various industrial applications, such as the production of dyes, pharmaceuticals, and detergents. Anhydrides, such as benzenesulfonic anhydride (C12H10O3S), are formed by the removal of water from two molecules of benzenesulfonic acid, resulting in a more reactive and versatile compound. These chemicals play a significant role in the synthesis of various organic compounds and have diverse applications in the chemical industry.

4972-30-9

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4972-30-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4972-30-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,9,7 and 2 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4972-30:
(6*4)+(5*9)+(4*7)+(3*2)+(2*3)+(1*0)=109
109 % 10 = 9
So 4972-30-9 is a valid CAS Registry Number.

4972-30-9Upstream product

4972-30-9Relevant academic research and scientific papers

Nickel-Catalyzed Sulfonylation of C(sp2)–H Bonds with Sodium Sulfinates

Liu, Shuang-Liang,Li, Xue-Hong,Zhang, Shu-Sheng,Hou, Sheng-Kai,Yang, Guang-Chao,Gong, Jun-Fang,Song, Mao-Ping

, p. 2241 - 2246 (2017)

The first nickel-catalyzed ortho-sulfonylation of C(sp2)–H bonds with sodium sulfinates directed by (pyridin-2-yl)isopropylamine (PIP-amine) is described. This strategy exhibits a broad substrate scope and good functional group tolerance with high monosulfonylation selectivity. Besides arenes and heteroarenes, the reaction can also be extended to alkenes, providing diverse diaryl and alkyl aryl sulfones in high yields. Furthermore, a plausible Ni(I)/Ni(III) mechanism is outlined based on our experimental results and related precedents. (Figure presented.).

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