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222054-67-3

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222054-67-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 222054-67-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,2,0,5 and 4 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 222054-67:
(8*2)+(7*2)+(6*2)+(5*0)+(4*5)+(3*4)+(2*6)+(1*7)=93
93 % 10 = 3
So 222054-67-3 is a valid CAS Registry Number.

222054-67-3Relevant articles and documents

Entropically favorable macrolactamization. Synthesis of isodityrosine peptide analogues by tandem Erlenmeyer condensation-macrolactamization

Bailey,Molinski

, p. 2500 - 2504 (2007/10/03)

Macrolactams containing a modified isodityrosine moiety were assembled by direct addition of a bis-4-aryliden-5(4H)-oxazolone, derived by double Erlenmeyer condensation of diaryl ether dicarboxaldehydes and an α,ω- diamine, derived from the same precursor. Tandem acylation of diamines with the bis-Erlenmeyer oxazolone gave macrolactams in yields of up to 30%. TECM demonstrates an entropically controlled 28-membered ring closure and allows rapid access to a variety of cyclic isodityrosine peptide analogues of the biologically active natural product bastadin-5.

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