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1665-95-8

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1665-95-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1665-95-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,6 and 5 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1665-95:
(6*1)+(5*6)+(4*6)+(3*5)+(2*9)+(1*5)=98
98 % 10 = 8
So 1665-95-8 is a valid CAS Registry Number.

1665-95-8Downstream Products

1665-95-8Relevant articles and documents

Chemoselective Deprotection of Sulfonamides under Acidic Conditions: Scope, Sulfonyl Group Migration, and Synthetic Applications

Javorskis, Tomas,Orentas, Edvinas

, p. 13423 - 13439 (2017)

Chemoselective acidic hydrolysis of sulfonamides with trifluoromethanesulfonic acid has been evaluated as a deprotection method and further extended to more complex synthetic applications. In contrast to conventional troublesome sulfonamide hydrolysis, a near-stoichiometric amount of acid was found to be sufficient to bring about efficient deprotection of various neutral or electron-deficient N-arylsulfonamides, whereas electron-rich substrates provided sulfonyl group migration products. The deprotection method developed is fully selective for N-arylsulfonamides, and the possibility to discriminate among various different sulfonamides is demonstrated.

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