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74514-19-5

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74514-19-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74514-19-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,5,1 and 4 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 74514-19:
(7*7)+(6*4)+(5*5)+(4*1)+(3*4)+(2*1)+(1*9)=125
125 % 10 = 5
So 74514-19-5 is a valid CAS Registry Number.

74514-19-5Relevant articles and documents

Rapid Oxidation Indoles into 2-Oxindoles Mediated by PIFA in Combination with n-Bu4NCl ? H2O

Liang, Peng,Zhao, Hang,Zhou, Tingting,Zeng, Kaiyun,Jiao, Wei,Pan, Yang,Liu, Yazhou,Fang, Dongmei,Ma, Xiaofeng,Shao, Huawu

, p. 3532 - 3538 (2021)

We report the development of a rapid approach for directly converting indoles into 2-oxindoles promoted by HOCl formed in situ from the combination of (bis(trifluoroacetoxy) iodo)benzene (PIFA) and n-Bu4NCl ? H2O. The procedure is widely functional group tolerant and provides 2-oxindoles in up to 95% yield within 5 min. The potential applications of the developed methodology are demonstrated by the gram-scale preparation of 3-methyl-2-oxindole (11 a), the one-pot two-step syntheses of spiro-oxindoles 26 a and 26 b, and the formal synthesis of (-)-folicanthine (2). (Figure presented.).

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