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2,1-Benzisoxazole-4,5-dione,4-oxime,(4Z)-(9CI) is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

640293-17-0

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640293-17-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 640293-17-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,0,2,9 and 3 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 640293-17:
(8*6)+(7*4)+(6*0)+(5*2)+(4*9)+(3*3)+(2*1)+(1*7)=140
140 % 10 = 0
So 640293-17-0 is a valid CAS Registry Number.

640293-17-0Relevant academic research and scientific papers

A novel cyclization to isoxazolo[3,4-e][2,1]benzisoxazole

Katritzky, Alan R.,Wang, Zuoquan,Hall, C.Dennis,Ji, Yu,Akhmedov, Novruz G.

, p. 3449 - 3451 (2007/10/03)

Methylation of 2,1-benzisoxazole 4,5-dione 4-oxime 2 using dimethyl sulfate in DMF and in the presence of potassium carbonate gave a substantial yield of isoxazolo[3,4-e][2,1]benzisoxazole 4 by an unexpected cyclization reaction of the O-methylation product 3.

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