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1373774-81-2

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1373774-81-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1373774-81-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,7,3,7,7 and 4 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1373774-81:
(9*1)+(8*3)+(7*7)+(6*3)+(5*7)+(4*7)+(3*4)+(2*8)+(1*1)=192
192 % 10 = 2
So 1373774-81-2 is a valid CAS Registry Number.

1373774-81-2Relevant articles and documents

Synthesis of 4-aryl-1,7-naphthyridine-2(1H)-thiones by the electrocyclic reaction of 4-(1-arylalk-1-enyl)-3-isothiocyanatopyridines Generated in situ from the corresponding Isocyanides

Kobayashi, Kazuhiro,Kozuki, Taketoshi,Suzuki, Teruhiko

, p. 556 - 563 (2012/05/20)

A convenient synthis for 4-substituted and 3,4-disubstituted 1,7-naphthyridine-2(1H)-thiones 7 has been developed. The method is based on the electrocyclic reaction of 4-(1-arylalk-1-enyl)-3-isothiocyanatopyridines 6, generated in situ by the treatment of the respective isocyanides 5 with S 8 in the presence of a catalytic amount of selenium. The isocyanides 5 can be easily prepared from commercially available pyridin-3-amine by conventional organic reactions.

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