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1277161-57-5

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1277161-57-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1277161-57-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,7,7,1,6 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1277161-57:
(9*1)+(8*2)+(7*7)+(6*7)+(5*1)+(4*6)+(3*1)+(2*5)+(1*7)=165
165 % 10 = 5
So 1277161-57-5 is a valid CAS Registry Number.

1277161-57-5Downstream Products

1277161-57-5Relevant articles and documents

Highly regioselective synthesis of novel aromatic esters of arbutin catalyzed by immobilized lipase from Penicillium expansum

Yang, Rong-Ling,Li, Ning,Ye, Min,Zong, Min-Hua

, p. 41 - 44 (2010)

Ester derivatives of phenolic glycosides have attracted more attention in food, cosmetic and pharmaceutical industries, due to their potent biological activities. In the present study, a group of novel aromatic esters of arbutin were successfully synthesized by using immobilized lipase from Penicillium expansum with excellent 6′-regioselectivities (>99%) and moderate to excellent isolated yields (68-93%), except for 6′-O-vanilloyl-arbutin and 6′-O-(p-hydroxycinnamoyl)-arbutin with 28% and 34% yields, respectively. Among all the acyl donors tested, the lipase was most active towards vinyl 3-phenylpropionate, while remarkable decrease in the activity was recorded when the phenyl of acyl donors carried the hydroxyl and/or methoxyl.

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