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331947-57-0

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331947-57-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 331947-57-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,1,9,4 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 331947-57:
(8*3)+(7*3)+(6*1)+(5*9)+(4*4)+(3*7)+(2*5)+(1*7)=150
150 % 10 = 0
So 331947-57-0 is a valid CAS Registry Number.

331947-57-0Downstream Products

331947-57-0Relevant articles and documents

An efficient synthesis of optical isomers of vasopressin V2 receptor antagonist OPC-41061 by lipase-catalyzed enantioselective transesterification

Matsubara, Jun,Morita, Seiji,Yamashita, Hiroshi,Otsubo, Kenji,Kitano, Kazuyoshi,Ohtani, Tadaaki,Kawano, Yoshikazu,Bando, Masahiko,Kido, Masaru,Ochida, Minoru,Tabusa, Fujio

, p. 131 - 138 (2007/10/03)

The optically active enantiomers of 7-chloro-5-hydroxy-1-[2- methyl-4-(2-methylbenzoylamino)benzoyl]-2,3,4,5-tetrahydro- 1H- 1-benzazepine (OPC-41061, 1) were enantioselectively synthesized. The chiral acetate ((R)-(-)-3) and the chiral alcohol ((S)-(+)-2) were prepared via the resolution of the racemic alcohol ((±)-2) using the lipase-mediated transesterification with vinyl acetate. Compounds ((R)-(-)-3) and ((S)-(+)-2) were converted to optically active 1.

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