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111424-64-7

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111424-64-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 111424-64-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,4,2 and 4 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 111424-64:
(8*1)+(7*1)+(6*1)+(5*4)+(4*2)+(3*4)+(2*6)+(1*4)=77
77 % 10 = 7
So 111424-64-7 is a valid CAS Registry Number.

111424-64-7Relevant articles and documents

Synthesis of 2,2-Dimethyl-2H-thiochromenes, the Sulfur Analogs of Precocenes

Tercio, J.,Ferreira, B.,Catani, V.,Comasseto, J. V.

, p. 149 - 153 (2007/10/02)

A new general synthesis of 2,2-dimethyl-2H-thiochromenes in good yield consists of the Michael addition of thiophenols to 3-methyl-2-butenoic acid, intramolecular cyclocondensation of the resultant 3-methyl-3-phenylthiobutanoic acids, reduction of the 2,2-dimethyl-4-oxothiochromenes thus obtained with sodium borohydride, and acid-catalyzed dehydration of the resultant 4-hydroxy-2,2-dimethylthiochromans.

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