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97139-96-3

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97139-96-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97139-96-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,1,3 and 9 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 97139-96:
(7*9)+(6*7)+(5*1)+(4*3)+(3*9)+(2*9)+(1*6)=173
173 % 10 = 3
So 97139-96-3 is a valid CAS Registry Number.

97139-96-3Relevant articles and documents

Short communication: Titanium-induced synthesis of benzofurans

Jumbam,Yedwa,Masamba

experimental part, p. 157 - 160 (2012/05/20)

Ketoesters derived from the acylation of o-hydroxyacetophenone with aliphatic as well as aromatic acid chlorides undergo intramolecular cyclization in the presence of low-valent titanium to afford benzofurans in good yields. The reduction of titanium trichloride with dry zinc powder in refluxing THF takes place in the presence of the ketoester which simultaneously cyclizes as the titanium catalyst is formed, rendering the pre-reduction of titanium trichloride in a separate step unnecessary.

A new metal complex promoted system for highly selective synthesis of 4H-chromen-4-ones (chromones)

Nishinaga,Ando,Maruyama,Mashino

, p. 839 - 841 (2007/10/02)

Co(III)(salpr)(OH), a six coordinate cobalt Schiff base complex, promotes the highly selective conversion of 1-(o-hydroxyaryl)-1,3-diketones to 4H-chromen-4-ones under neutral conditions.

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