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23837-25-4

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23837-25-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 23837-25-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,8,3 and 7 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 23837-25:
(7*2)+(6*3)+(5*8)+(4*3)+(3*7)+(2*2)+(1*5)=114
114 % 10 = 4
So 23837-25-4 is a valid CAS Registry Number.

23837-25-4Relevant articles and documents

Copper-catalyzed synthesis of sulfenamides utilizing diaryl disulfides with alkyl amines

Taniguchi, Nobukazu

, p. 1917 - 1920 (2007)

The copper-catalyzed coupling of diaryl disulfides with alkyl amines can afford various sulfenamides in good yields. Furthermore, the present reaction is efficient and can be used for both of the aryl sulfide groups on disulfide. Georg Thieme Verlag Stutt

Copper-catalyzed formation of sulfur-nitrogen bonds by dehydrocoupling of thiols with amines

Taniguchi, Nobukazu

experimental part, p. 2670 - 2673 (2010/07/18)

Copper-catalyzed formation of sulfur-nitrogen bonds can be performed by a dehydrocoupling of aryl thiols with amines. Sulfenamides or sulfonamides can be produced by the use of a copper catalyst in air or under oxygen atmosphere. Furthermore, a reaction involving the combination of a palladium catalyst and a copper catalyst selectively afforded sulfinamides.

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