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138508-10-8

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138508-10-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138508-10-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,5,0 and 8 respectively; the second part has 2 digits, 1 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 138508-10:
(8*1)+(7*3)+(6*8)+(5*5)+(4*0)+(3*8)+(2*1)+(1*0)=128
128 % 10 = 8
So 138508-10-8 is a valid CAS Registry Number.

138508-10-8Relevant articles and documents

An Efficient Synthesis of (2S,4S)-2-Substituted-4-mercaptopyrrolidine Derivatives

Matsumura, Haruki,Bando, Takashi,Sunagawa, Makoto

, p. 147 - 160 (2007/10/02)

An efficient synthesis of (2S,4S)-2-substituted 4-mercapto-1-p-nitrobenzyloxycarbonylpyrrolidine (2) was studied.Intramolecular cyclization of (2S,4R)-1-p-nitrobenzyloxycarbonyl-4-methanesulfonyloxy-2-pyrrolidinethiocarboxylic acid (8), derived from trans-4-hydroxy-L-proline (3), afforded (1S,4S)-5-p-nitrobenzyloxycarbonyl-2-thia-5-azabicycloheptan-3-one (7).Reaction of 7 with primary amine, secondary amine and alkoxide afforded corresponding 2 in high yield.

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