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231291-83-1

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231291-83-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 231291-83-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,3,1,2,9 and 1 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 231291-83:
(8*2)+(7*3)+(6*1)+(5*2)+(4*9)+(3*1)+(2*8)+(1*3)=111
111 % 10 = 1
So 231291-83-1 is a valid CAS Registry Number.

231291-83-1Relevant articles and documents

Stereoselective synthesis of β-amino alcohols: Practical preparation of all four stereomers of N-PMB-protected sphingosine from L- and D-serine

Chung, Sung-Kee,Lee, Jae-Mok

, p. 1441 - 1444 (2007/10/03)

Serine was efficiently converted to the N-p-methoxybenzyl (PMB) protected α'-amino enone derivative 6, which was reduced with Zn(BH4)2 to the corresponding anti-β-amino alcohol in >96% de. On the other hand, N- PMB-N-Boc-protected α'-amino enone derivative 8 was reduced by NaBH4 to syn-product with a diastereoselectivity of ca. 90%.

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