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1639427-95-4

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1639427-95-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1639427-95-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,9,4,2 and 7 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1639427-95:
(9*1)+(8*6)+(7*3)+(6*9)+(5*4)+(4*2)+(3*7)+(2*9)+(1*5)=204
204 % 10 = 4
So 1639427-95-4 is a valid CAS Registry Number.

1639427-95-4Downstream Products

1639427-95-4Relevant articles and documents

From renewable levulinic acid to a diversity of 3-(Azol-3-yl)propanoates

Flores, Alex F. C.,Piovesan, Luciana A.,Pizzuti, Lucas,Flores, Darlene C.,Malavolta, Juliana L.,Martins, Marcos A. P.

, p. 733 - 740 (2014)

Efficient heterocyclization of methyl 7,7,7-trifluoro-4-methoxy-6-oxo-4- heptenoate and methyl 7,7,7-trichloro-4-methoxy-6-oxo-4-heptenoate into isoxazole and pyrazole derivatives that represent a new type of glutamate-like 3-(trihalomethylated-1,2-azol-3-yl)propanoate is reported. Preparation of the key methyl 7,7,7-trihalo-4-methoxy-6-oxohept-4-enoate precursors from levulinic acid is also described. The synthetic potential of this synthetic protocol was indicated by the production of several methyl and ethyl 3-(isoxazol-3-yl) propanoates and 3-(1H-pyrazol-3-yl)propanoates, and the respective acid derivatives, in good (70-95%) yields. The crystal structure for ethyl 5-(3-ethoxy-3-oxopropyl)-1H-pyrazole-3-carboxylate (10c) has been determined by monocrystal X-ray diffraction analysis. The N-H...H intermolecular hydrogen bonds join the molecules into catamer.

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