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1620842-13-8

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1620842-13-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1620842-13-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,0,8,4 and 2 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1620842-13:
(9*1)+(8*6)+(7*2)+(6*0)+(5*8)+(4*4)+(3*2)+(2*1)+(1*3)=138
138 % 10 = 8
So 1620842-13-8 is a valid CAS Registry Number.

1620842-13-8Downstream Products

1620842-13-8Relevant articles and documents

An efficient synthesis of 4(5)-benzyl- L -histidines employing catalytic transfer hydrogenolysis at elevated temperatures

Smith, D. David,Gallagher, Audrey T.,Crowley, Vincent M.,Gergens, Wayne M.,Abel, Peter W.,Hulce, Martin

, p. 515 - 521 (2014/03/21)

An efficient two-step synthesis of 4(5)-benzyl-l-histidine from l-histidine was developed. A Pictet-Spengler reaction between l-histidine and benzaldehyde in the presence of excess strong base yielded 4-l-phenylspinacine within one hour. Catalytic transfer hydrogenolysis in methanol at reflux using ammonium formate rapidly converted 4-l-phenylspinacine to 4(5)-benzyl-l-histidine within five minutes. No racemization of the final product 4(5)-benzyl-l-histidine was observed using the Marfey reagent. To show the utility of this method, a series of fluorinated benzylhistidines were prepared.

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