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324012-40-0

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324012-40-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 324012-40-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,2,4,0,1 and 2 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 324012-40:
(8*3)+(7*2)+(6*4)+(5*0)+(4*1)+(3*2)+(2*4)+(1*0)=80
80 % 10 = 0
So 324012-40-0 is a valid CAS Registry Number.

324012-40-0Relevant articles and documents

An efficient and enantioselective synthesis of d-biotin

Chen,Huang,Fu,Cheng,Zhang,Li,Peng

, p. 2004 - 2008 (2007/10/03)

An efficient and enantioselective synthesis of d-biotin 1 starting from cis-1,3-dibenzyl-2-imidazo-lidone-4,5-dicarboxylic acid (6) is described. The key steps are the enantioselective reduction of meso-1,2-dicarboxylic thioanhydride 8 to prepare the (3as, 6ar)- thiolactone 9 and the introduction of the C6 side chain at C-2 in 9 via a modified Grignard reaction. This novel synthesis proceeded in six steps to afford 1 with 21% overall yield.

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