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81837-96-9

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81837-96-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81837-96-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,8,3 and 7 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 81837-96:
(7*8)+(6*1)+(5*8)+(4*3)+(3*7)+(2*9)+(1*6)=159
159 % 10 = 9
So 81837-96-9 is a valid CAS Registry Number.

81837-96-9Relevant articles and documents

2,4-Bis(4-methylphenylthio)-1,3,2λ5,4λ5-dithiadiphosphetane-2,4-dithione: A New Reagent for Thiation of N,N-Disubstituted Amides

Wipf, Peter,Jenny, Christjohannes,Heimgartner, Heinz

, p. 1001 - 1011 (2007/10/02)

As a new reagent for the thiation of amides, the easily accessible 2,4-bis(4-methylphenylthio)-1,3,2λ5,4λ5-dithiadiphosphetane-2,4-dithione (9) shows a remarkable selectivity.This selectivity - the preferred thiation of N,N-disubstituted amides - is complementary to the one of the well known Lawesson reagent.Thiation of diamides of type 2 with 9 leads via cyclization of the corresponding dithiodiamides directly to 1,3-thiazole-5(4H)-thiones 1.

1,3-Dipolare Cycloadditionen von 2-(Benzonitrilio)-2-propanid mit 4,4-Dimethyl-2-phenyl-2-thiazolin-5-thion und Schwefelkohlenstoff

Obrecht, Daniel,Prewo, Roland,Bieri, Jost H.,Heimgartner, Heinz

, p. 1825 - 1836 (2007/10/02)

Irradiation of 2,2-dimethyl-3-phenyl-2H-azirine (11) in the presence of 4,4-dimethyl-2-phenyl-2-thiazolin-5-thione (7) yields a mixture of the three (1:1)-adducts 8, 12 and 13 (Schemes 3 and 6).The formation of 8 and 12 can be explained by 1,3-dipolar cyc

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