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812681-73-5

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812681-73-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 812681-73-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,1,2,6,8 and 1 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 812681-73:
(8*8)+(7*1)+(6*2)+(5*6)+(4*8)+(3*1)+(2*7)+(1*3)=165
165 % 10 = 5
So 812681-73-5 is a valid CAS Registry Number.

812681-73-5Upstream product

812681-73-5Relevant articles and documents

A cation-exchange resin promoted imino aldol reaction, leading to the synthesis of 2-isocephem and 2-oxa-isocephem

Shimizu, Makoto,Tachi, Masanori,Hachiya, Iwao

, p. 1394 - 1395 (2007/10/03)

Imino aldol reaction of ketene silyl acetals with the chiral imine 1 proceeds smoothly to give β-amino esters in good yields with high diasetereoselectivity under the influence of a cation-exchange resin, and the subsequent functional group transformation

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