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199587-26-3

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199587-26-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 199587-26-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,5,8 and 7 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 199587-26:
(8*1)+(7*9)+(6*9)+(5*5)+(4*8)+(3*7)+(2*2)+(1*6)=213
213 % 10 = 3
So 199587-26-3 is a valid CAS Registry Number.

199587-26-3Downstream Products

199587-26-3Relevant articles and documents

Reactivity of p-Phenyl Substituted β-Enamino Compounds using K-10/ultrasound. I. Synthesis of Pyrazoles and Pyrazolinones

Valduga, Claudete J.,Braibante, Hugo S.,Braibante, Mara E.F.

, p. 189 - 192 (2007/10/03)

The reactivity of the β-enamino ketones, 3-amino-l-(p-phenyl-substituted)-2-buten-l-ones la-d and β-enamino esters. Ethyl-3-amino-3-(p-phenyl-substituted)-2-propenoates 5a-d were evaluated by systematic studies of the reactions with hydrazine and methylhydrazine by reactions with solid support K-10/ultrasound and homogeneous media (reflux in ethanol or dichloromethane) yielding pyrazole rings 2a-d, Af-methylpyrazoles 3a-d, 4a-d and N-methylpyrazolinones 6a-c and 7a-c. The regiochemistry of the cyclization showed dependence of the reaction conditions employed as well as the substituent in the aromatic ring.

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