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214892-52-1

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214892-52-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 214892-52-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,4,8,9 and 2 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 214892-52:
(8*2)+(7*1)+(6*4)+(5*8)+(4*9)+(3*2)+(2*5)+(1*2)=141
141 % 10 = 1
So 214892-52-1 is a valid CAS Registry Number.

214892-52-1Relevant articles and documents

The formal total synthesis of epothilone A

Kalesse, Markus,Quitschalle, Monika,Claus, Eckhard,Gerlach, Kai,Pahl, Axel,Meyer, Hartmut H.

, p. 2817 - 2823 (2007/10/03)

The formal total synthesis of epothilone A is described. The key steps in the synthesis of the northern hemisphere are a Z-selective ten-membered ring-closing metathesis reaction (RCM) and the diastereoselective alkylation at C8. Aldehyde 3 is formed by introduction of the thiazole moiety by a Wittig reaction and subsequent functional group transformation. An efficient route to keto acid 5 is described.

Synthesis of the northern hemisphere of epothilone A by a ten-membered ring closing metathesis reaction

Gerlach, Kai,Quitschalle, Monika,Kalesse, Markus

, p. 3553 - 3556 (2007/10/03)

The synthesis of the strained epothilone analog containing a ten- membered ring as well as the northern hemisphere of epothilone A is described. This approach, using the ring closing metathesis reaction, is a solution to the lack of stereocontrol observed

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