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1269788-52-4

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1269788-52-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1269788-52-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,6,9,7,8 and 8 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1269788-52:
(9*1)+(8*2)+(7*6)+(6*9)+(5*7)+(4*8)+(3*8)+(2*5)+(1*2)=224
224 % 10 = 4
So 1269788-52-4 is a valid CAS Registry Number.

1269788-52-4Relevant articles and documents

Organocatalytic asymmetric synthesis of quinine and quinidine

Sarkar, Shaheen M.,Taira, Yuko,Nakano, Ayako,Takahashi, Keisuske,Ishihara, Jun,Hatakeyama, Susumi

supporting information; experimental part, p. 923 - 927 (2011/03/20)

Quinine and quinidine were synthesized by a highly enantio- and stereoselective approach starting from a proline-catalyzed asymmetric cycloaldolization of benzyl bis(2-formylethyl)carbamate which gave a 70:30 mixture of (3R,4R)-N-Cbz-3-hydroxymethyl-4-hydroxypiperidine (96% ee) and its 4S-epimer (92% ee) in 94% yield after in situ NaBH4 reduction.

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