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81467-15-4

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81467-15-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81467-15-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,4,6 and 7 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81467-15:
(7*8)+(6*1)+(5*4)+(4*6)+(3*7)+(2*1)+(1*5)=134
134 % 10 = 4
So 81467-15-4 is a valid CAS Registry Number.

81467-15-4Relevant articles and documents

3-(1-Hydroxyalkyl)-1,4,2-dioxazol-5-ones and 3-Hydroxyoxazolidine-2,4-diones from 2-Hydroxycarbohydroxamic Acids and 1,1'-Carbonyldiimidazole

Geffken, Detlef

, p. 211 - 218 (2007/10/02)

The reaction of 2-hydroxycarbohydroxamic acids 6 with 1,1'-carbonyldiimidazole produces 3-(1-hydroxyalkyl)-1,4,2-dioxazol-5-ones 7 and 3-hydroxyoxazolidine-2,4-diones 8.The formation of the heterocycles 7 and 8 depends largely on the substitution at C-2 of 6.Excess of imidazole causes rapid decomposition of 7 into carbonyl compound 9 and isocyanic acid, which yields the adduct 10 with imidazole.Benzylaminolysis of 7a gives 11 whereas the reaction of 7a with 3-chloroaniline produces the ureas 12 and 14 and benzophenone (9a).From the reaction of 7a with imidazole in a mole ratio of 1 : 1 the decomposition products 9a and 10 and 3-hydroxy-5,5-diphenyloxazolidine-2,4-dione (8a) are obtained.

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