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199725-34-3

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199725-34-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 199725-34-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,7,2 and 5 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 199725-34:
(8*1)+(7*9)+(6*9)+(5*7)+(4*2)+(3*5)+(2*3)+(1*4)=193
193 % 10 = 3
So 199725-34-3 is a valid CAS Registry Number.

199725-34-3Downstream Products

199725-34-3Relevant articles and documents

Benzofuran Systems. Synthesis and Biological Examination of 1-(3-Benzofuranyl)-2-phenylethanones

Kwiecien, Halina,Baumann

, p. 1587 - 1590 (2007/10/03)

Novel 1-(3-benzofuranyl)-2-phenylethanones 4a-d have been prepared by acetylation of 2-alkylbenzofurans 2a-c with phenylacetyl chlorides 3a-b. The methoxy derivatives 4b-d have been demethylated to the corresponding phenols 5b-d with pyridinium hydrochloride. An attempt to obtain the derivatives of 4d and 5a iodinated in the phenyl ring has been undertaken. The novel compounds have been characterized by ir and nmr spectra and their biological activity examined.

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