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7182-32-3

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7182-32-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 7182-32-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,1,8 and 2 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 7182-32:
(6*7)+(5*1)+(4*8)+(3*2)+(2*3)+(1*2)=93
93 % 10 = 3
So 7182-32-3 is a valid CAS Registry Number.

7182-32-3Relevant articles and documents

Transition Metal-Free Synthesis of Halobenzo[b]furans from O-Aryl Carbamates via o-Lithiation Reactions

Feberero, Claudia,Renedo, Lorena,Sanz, Roberto,Sedano, Carlos,Suárez-Pantiga, Samuel,Virumbrales, Cintia

, (2022/01/24)

A straightforward and transition metal-free one-pot protocol to synthesize halobenzo[b]furans has been developed employing simple and easily available starting materials such as O-aryl carbamates and alkynylsulfones. The fine-tuning of the different steps involved was key to achieving a successful one-pot procedure. Initially, a directed ortho-lithiation process, which uses the carbamate as the directed metalation group, was crucial in providing access to O-2-alkynylaryl N,N-diethyl carbamates by a direct alkynylation of the o-lithiated carbamate, with arylsulfonylalkynes as electrophilic reagents. Cyclization of the generated o-alkynylaryl carbamates was successfully accomplished through a strategy involving in situ carbamate alkaline hydrolysis under conventional heating or microwave irradiation, coupled with a subsequent heterocyclization step delivering the desired benzo[b]furans. A wide variety of new halobenzo[b]furans has been synthesized and their utility has been demonstrated by their further transformation.

Synthesis and biological evaluation of 2-arylbenzofuran derivatives as potential anti-Alzheimer’s disease agents

Yun, Yinling,Miao, Yuhang,Sun, Xiaoya,Sun, Jie,Wang, Xiaojing

, p. 1346 - 1356 (2021/06/26)

Alzheimer's disease (AD) is a type of progressive dementia caused by degeneration of the nervous system. A single target drug usually does not work well. Therefore, multi-target drugs are designed and developed so that one drug can specifically bind to mu

Synthesis of Benzo[ b]furans by Intramolecular C-O Bond Formation Using Iron and Copper Catalysis

Henry, Martyn C.,Sutherland, Andrew

, p. 2766 - 2770 (2020/03/30)

One-pot processes for the synthesis of benzo[b]furans from 1-aryl- or 1-alkylketones using nonprecious transition metal catalysts have been developed. Regioselective iron(III)-catalyzed halogenation of the aryl ring, followed by iron- or copper-catalyzed O-arylation allowed the synthesis of various structural analogues, including the benzo[b]furan-derived natural products corsifuran C, moracin F, and caleprunin B.

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