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205443-19-2

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205443-19-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 205443-19-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,4,4 and 3 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 205443-19:
(8*2)+(7*0)+(6*5)+(5*4)+(4*4)+(3*3)+(2*1)+(1*9)=102
102 % 10 = 2
So 205443-19-2 is a valid CAS Registry Number.

205443-19-2Downstream Products

205443-19-2Relevant articles and documents

Enzymatic resolution of methyl N-alkyl-azetidine-2-carboxylates by Candida antarctica lipase-mediated ammoniolysis

Starmans, Wim A. J.,Doppen, Roy G.,Thijs, Lambertus,Zwanenburg, Binne

, p. 429 - 435 (1998)

A facile method for the synthesis of optically active azetidine-2- carboxylic acid derivatives is presented Racemic N-alkylated azetidine esters are resolved by lipase from Candida antarctica in an ammoniolysis reaction, and both the S-amide and the R-ester are obtained with excellent stereoselectivity.

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