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54571-25-4

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54571-25-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54571-25-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,5,7 and 1 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 54571-25:
(7*5)+(6*4)+(5*5)+(4*7)+(3*1)+(2*2)+(1*5)=124
124 % 10 = 4
So 54571-25-4 is a valid CAS Registry Number.

54571-25-4Downstream Products

54571-25-4Relevant articles and documents

Migration of an acyl group in the pyrazole system: Synthesis of 1-acyl-3-hydroxy-1H-pyrazoles and related derivatives. A new preparation of N,N′-diacylhydrazines

Kepe, Vladimir,Pozgan, Franc,Golobic, Amalija,Polanc, Slovenko,Kocevar, Marijan

, p. 2813 - 2816 (2007/10/03)

A new general method for the synthesis of 1-acyl-3-hydroxy-1H-pyrazoles 5a-f and related derivatives 5g-i starting from 4-ethoxymethylene-2-phenyloxazol-5(4H)-one (1) and hydrazides, 4-phenylsemicarbazide, 4-phenylthiosemicarbazide and benzyl carbazate in boiling dioxane is described. The method includes a migration of an acyl or related unit. The X-ray study and NMR spectroscopic examination confirmed the structure of the products. A one-pot synthesis of N,N′-diacylhydrazines from hydrazides by the assistance of oxazolone 1 is also presented.

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