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201347-13-9

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201347-13-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 201347-13-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,1,3,4 and 7 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 201347-13:
(8*2)+(7*0)+(6*1)+(5*3)+(4*4)+(3*7)+(2*1)+(1*3)=79
79 % 10 = 9
So 201347-13-9 is a valid CAS Registry Number.

201347-13-9Relevant articles and documents

Enantioselective synthesis of 4-substituted 2-pyrrolidinones by site- selective C-H insertion of α-methoxycarbonyl-α-diazoacetanilides catalyzed by dirhodium(II) tetrakis[N-phthaloyl-(S)-tert-leucinate]

Anada, Masahiro,Hashimoto, Shun-Ichi

, p. 79 - 82 (1998)

Site- and enantioselective intramolecular C-H insertion of α- methoxycarbonyl-α-diazoacetamides has been achieved by exploiting a p- nitrophenyl group as the N-substituent and dirhodium(II) tetrakis[N- phthaloyl-(S)-tert-leucinate] as catalyst, leading to the formation of 4 substituted 2-pyrrolidinone derivatives of up to 82% ee. The efficiency of the present protocol has been verified well by a short-step synthesis of (R)- (-)-baclofen.

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