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87287-43-2

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87287-43-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87287-43-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,2,8 and 7 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 87287-43:
(7*8)+(6*7)+(5*2)+(4*8)+(3*7)+(2*4)+(1*3)=172
172 % 10 = 2
So 87287-43-2 is a valid CAS Registry Number.

87287-43-2Relevant articles and documents

Reaction of 2-Dimethyaminomethylene-1,3-diones with Dinucleophiles. II. Synthesis of 5-(Alkyl)(Phenyl)-4-acylisoxazoles and 6,7-Dihydro-1,2-benzisoxazol-4(5H)-ones

Menozzi, Giulia,Schenone, Pietro,Mosti, Luisa

, p. 645 - 648 (2007/10/02)

The reaction of open-chain and cyclohexane sym-2-dimethyaminomethylene-1,3-diones with hydroxylamine hydrochloride in refluxing methanol gave in good to moderate yields a series of 5-(alkyl)(phenyl)-4-acylisoxazoles and 6,7-dihydro-1,2-benzisoxazol-4(5H)-ones, respectively.As 3-unsubstituted isoxazoles, all these compounds easily isomerized with sodium methoxide to the corresponding 2-cyano-1,3-diones in high yields.

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