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40055-37-6

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40055-37-6 Usage

Uses

2-(3-Pyridyl)-2-oxazoline is an impurity of Nicorandil (N398500). Nicorandil impurity E.

Check Digit Verification of cas no

The CAS Registry Mumber 40055-37-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,0,5 and 5 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 40055-37:
(7*4)+(6*0)+(5*0)+(4*5)+(3*5)+(2*3)+(1*7)=76
76 % 10 = 6
So 40055-37-6 is a valid CAS Registry Number.

40055-37-6Relevant articles and documents

The stability of nicorandil in aqueous solution. I. Kinetics and mechanism of decomposition of N-(2-hydroxyethyl)nicotinamide nitrate (ester) in aqueous solution

Nagai,Kikuchi,Nagano,Shiba

, p. 1063 - 1070 (1984)

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Nicorandil preparation method

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Paragraph 0035-0040, (2020/04/06)

The invention discloses a nicorandil preparation method, which comprises the following steps: synthesis of 3-pyridyloxazolidine: under stirring, adding aminoethanol and a solid bromination reagent into an alcoholic solution of 3-pyridylaldehyde, stirring at room temperature until the 3-pyridylaldehyde is completely consumed, quenching the reaction system with a saturated sodium thiosulfate solution, extracting with ethyl acetate, and concentrating the organic phase to obtain a crude product 3-pyridyloxazolidine; and synthesis of nicorandil: dissolving the 3-pyridyloxazolidine in a solvent, adding nitrite, heating, introducing an oxygen-containing gas, stirring until the 3-pyridyloxazolidine is completely consumed, quenching with a saturated sodium sulfate solution, extracting with ethyl acetate, concentrating, adding the crude product into a 30% ethyl acetate n-hexane solution until dissloving, cooling to 10 DEG C, precipitating a solid, and filtering to obtain the nicorandil.

Synthesis of heterocyclic 1,3-oxazolines from aldehydes with trimethylphenylammonium tribromide

Sayama, Shinsei

, p. 979 - 990 (2017/06/13)

Various heterocyclic 1,3-oxazolines were prepared from aldehydes and aminoalcohols with trimethylphenylammonium tribromide at room temperature.

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