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131287-24-6

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131287-24-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131287-24-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,2,8 and 7 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 131287-24:
(8*1)+(7*3)+(6*1)+(5*2)+(4*8)+(3*7)+(2*2)+(1*4)=106
106 % 10 = 6
So 131287-24-6 is a valid CAS Registry Number.

131287-24-6Downstream Products

131287-24-6Relevant articles and documents

SULFONYL DERIVATIVES OF 2,5-DIPHENYLFURAZAN

Cremlyn, Richard J.,Sheppard, Richard,Swinbourne, Frederick J.

, p. 117 - 121 (2007/10/02)

2,5-Diphenylfurazan (2) was converted into the monosulfonyl chlorides (3a, 3b) on treatment with chlorosulfonic acid (ca. 7 moles).These products were identified by reaction with secondary amines when both 3'- and 4'-sulfonyl derivatives were isolated.Under more forcing conditions, using a much larger excess of the reagent (ca. 25 moles), bis-substition was achieved.Although TLC indicated the formation of two products, after reaction with secondary amines only 3',3''-disulfonyl derivatives could be isolated.These results are discussed in electronic terms.

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