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113557-35-0

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113557-35-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 113557-35-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,3,5,5 and 7 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 113557-35:
(8*1)+(7*1)+(6*3)+(5*5)+(4*5)+(3*7)+(2*3)+(1*5)=110
110 % 10 = 0
So 113557-35-0 is a valid CAS Registry Number.

113557-35-0Downstream Products

113557-35-0Relevant articles and documents

Convenient synthesis of 2,3,9,10-tetraoxygenated protoberberine alkaloids and their 13-methyl alkaloids

Hanaoka, Miyoji,Hirasawa, Taeko,Cho, Won Jea,Yasuda, Shingo

, p. 399 - 404 (2007/10/03)

New and convenient synthesis of 2,3,9,10-tetraoxygenated protoberberine alkaloids and their 13-methyl alkaloids through the same intermediates was developed. Acylation of the brominated benzylphenethylamine (13) with α- chloro-α-(methylthio)acetyl chloride, followed by cyclization with stannic chloride, furnished the key intermediates 4-methylthio-3- phenethylisoquinolin-3-ones (14), which were methylated to provide their methyl derivatives (17). Both isoquinolin-3-ones (14, 17) were easily transformed into protoberberine alkaloids (16) and their 13-methyl alkaloids (21) in good yield.

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