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1542167-08-7

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1542167-08-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1542167-08-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,4,2,1,6 and 7 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1542167-08:
(9*1)+(8*5)+(7*4)+(6*2)+(5*1)+(4*6)+(3*7)+(2*0)+(1*8)=147
147 % 10 = 7
So 1542167-08-7 is a valid CAS Registry Number.

1542167-08-7Upstream product

1542167-08-7Relevant articles and documents

Total syntheses of (-)-pyrimidoblamic acid and P-3A

Duerfeldt, Adam S.,Boger, Dale L.

, p. 2119 - 2125 (2014/03/21)

Total syntheses of (-)-pyrimidoblamic acid and P-3A are disclosed. Central to the convergent approach is a powerful inverse electron demand Diels-Alder reaction between substituted electron-deficient 1,2,3-triazines and a highly functionalized and chiral primary amidine, which forms the pyrimidine cores and introduces all necessary stereochemistry in a single step. Intrinsic in the convergent approach is the potential it provides for the late stage divergent synthesis of modified analogs bearing deep-seated changes in either the pyrimidine cores or the highly functionalized C2 side chain common to both natural products. The examination of the key cycloaddition reaction revealed that the inherent 1,2,3-triazine mode of cycloaddition (C4/N1 vs C5/N2) as well as the amidine regioselectivity were unaffected by introduction of two electron-withdrawing groups (-CO2R) at C4 and C6 of the 1,2,3-triazine even if C5 is unsubstituted (Me or H), highlighting the synthetic potential of the powerful pyrimidine synthesis.

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