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81852-22-4

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81852-22-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81852-22-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,8,5 and 2 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 81852-22:
(7*8)+(6*1)+(5*8)+(4*5)+(3*2)+(2*2)+(1*2)=134
134 % 10 = 4
So 81852-22-4 is a valid CAS Registry Number.

81852-22-4Relevant articles and documents

Reactions of Monoprotic Thioureas with Ethyl α-Chloroacetoacetate, Ethyl Bromomalonate, and Ethyl Bromocyanoacetate

Singh, Harjit,Ahuja, Amarjit S.,Malhotra, Nageshwar

, p. 653 - 656 (2007/10/02)

N,N,-Dialkyl-N'-arylthioureas (1) with ethyl α-chloroacetoacetate, furnished dialkylamine hydrochlorides, aryl isothiocyanates, 2-arylimino-1,3-oxathioles (2), 2-arylimino-3-aryl Δ4-thiazolines (3), diarylthioureas (9), and carbonyl sulphide.With ethyl bromomalonate the products were dialkylamine hydrobromides, aryl isothiocyanates, 2-arylimino-3-arylthiazolidin-4-ones (11), and diarylthioureas (9).Ethyl bromocyanoacetate gave an ethyl cyanothio>acetate (13).Compound (13) with triethylamine gave the starting thiourea (1) and diethyl dicyanofumarate.

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