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220623-04-1

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220623-04-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220623-04-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,6,2 and 3 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 220623-04:
(8*2)+(7*2)+(6*0)+(5*6)+(4*2)+(3*3)+(2*0)+(1*4)=81
81 % 10 = 1
So 220623-04-1 is a valid CAS Registry Number.

220623-04-1Relevant articles and documents

Cyclopropanation reactions of pyroglutamic acid-derived synthons with akylidene transfer reagents

Zhang, Rui,Mamai, Ahmed,Madalengoitia, Jose S.

, p. 547 - 555 (2007/10/03)

The cyclopropanation of unsaturated lactams 1 and 3 derived from pyroglutamic acid with nucleophilic alkylidene transfer reagents is investigated. Good-to-modest yields of cyclopropanes were obtained with most sulfur ylides explored. Syn/anti selectivity was found to be dependent on the synthon as well as the sulfur ylide. This cyclopropanation methodology is used in the synthesis of arginine and glutamic acid analogues.

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