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259148-89-5

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259148-89-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 259148-89-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,9,1,4 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 259148-89:
(8*2)+(7*5)+(6*9)+(5*1)+(4*4)+(3*8)+(2*8)+(1*9)=175
175 % 10 = 5
So 259148-89-5 is a valid CAS Registry Number.

259148-89-5Relevant articles and documents

Redox-Divergent Construction of (Dihydro)thiophenes with DMSO

Chen, Qing-An,He, Gu-Cheng,Hu, Yan-Cheng,Ji, Ding-Wei,Liu, Heng,Zhang, Xiang-Xin,Zhao, Chao-Yang

, p. 24284 - 24291 (2021/10/08)

Thiophene-based rings are one of the most widely used building blocks for the synthesis of sulfur-containing molecules. Inspired by the redox diversity of these features in nature, we demonstrate herein a redox-divergent construction of dihydrothiophenes, thiophenes, and bromothiophenes from the respective readily available allylic alcohols, dimethyl sulfoxide (DMSO), and HBr. The redox-divergent selectivity could be manipulated mainly by controlling the dosage of DMSO and HBr. Mechanistic studies suggest that DMSO simultaneously acts as an oxidant and a sulfur donor. The synthetic potentials of the products as platform molecules were also demonstrated by various derivatizations, including the preparation of bioactive and functional molecules.

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